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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
What is the chief source of wind energy . |
| Answer» Ur ovary and boobs | |
| 352. |
What is a chief source of energy . |
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Answer» The passage states that energy comes from the sun in the form of light (one kind) and is then converted into different kinds of energy. So, we can conclude that the chief source of energy is the Sun. Sun |
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| 353. |
koi bhi pdf zoom kyu nhi ho rha h |
| Answer» Try wps office | |
| 354. |
lightning is flow of charges in cloud layers is possible due to? |
| Answer» Lightning\xa0is due to the discharge of two static unlikely charged clouds\xa0when they come close to each other. | |
| 355. |
What is the units of kidney? |
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Answer» Nephron The\xa0nephron, the functional unit of the kidney, is responsible for removing waste from the body. Each kidney is composed of over one\xa0million nephrons\xa0that dot the\xa0renal cortex, giving it a granular appearance when sectioned sagittally (from front to rear) A nephron is the basic structural and functional\xa0unit\xa0of the\xa0kidney. They are the microscopic structure composed of a\xa0renal\xa0corpuscle and a\xa0renal\xa0tubule. The word nephron is derived from the Greek word – nephros, meaning\xa0kidney. There are about millions of nephrons in each human\xa0kidney Nephron |
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| 356. |
What is dot structure for propane |
| Answer» Structural formula and electron dot structure of propane.\tPropane is a hydrocarbon that is composed of carbon and hydrogen atoms.\tTo draw the structural formula as well as the electron dot structure of propane, its structural formula is needed. The\xa0structural formula of propane is\xa0.\tAs valence electrons are used to draw the electron dot structure, the number of valence electrons of propane must be identified. Accordingly, propane has\xa020 valence electrons.\tAs\xa0Carbon atom is present in less, it is determined as the center atom.\tThe valence electron must be denoted in such a way that all the elements present in the compound have\xa0attained octet (in case of hydrogen it is duet).\tFor the structure of propane refer the attachment | |
| 357. |
What is the definition of parturition? |
| Answer» Parturition means childbirth. It is also known as labour. It is the mechanism of signalling the onset of labour (or) a procedure of delivering a child after the completion of pregnancy period. The developed child is born with the release of cortisol.During parturition process, the cervix dilates and relaxes. Along with cortisol, oxytocin and estrogen hormones are released to begin the milk production and labour. | |
| 358. |
In activity series platinum is placed after gold,than why gold is said to be least reactive. |
| Answer» In a\xa0reactivity\xa0series, the\xa0most reactive\xa0element is placed at the top and the least\xa0reactive\xa0element at the bottom.\xa0More reactive metals\xa0have a greater tendency to lose electrons and form positive ions . In terms of optical properties, metals are shiny and lustrous. ... The transition metals (such as iron, copper, zinc, and nickel) are slower to oxidize because they form a passive layer of oxide that protects the interior. Others, like palladium,\xa0platinum\xa0and\xa0gold\xa0do not react with the atmosphere at all. | |
| 359. |
What is. Biotic organisms |
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Answer» The biotic organism are all living beings which are the important part of our environment. For example flora and fauna Kuchbhi jo zinda ho Biotic factors relate to all the\xa0living things\xa0in the ecosystem. Their presence and their biological by-products affect the composition of an ecosystem. Biotic factors refer to all living organisms from animals and humans, to plants, fungi, and bacteria. The interactions between various biotic factors are necessary for the reproduction of each species and to fulfil essential requirements like food, etc.Examples of\xa0Biotic FactorsExamples of biotic resources include all the living components present in an ecosystem. These include producers, consumers, decomposers and detritivores. A biotic factor is a living organism that shapes its environment. In a freshwater ecosystem, examples might include aquatic plants, fish, amphibians, and algae. Biotic and abiotic factors work together to create a unique ecosystem. |
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| 360. |
What do you mean by mitochondria in cell organisms and placenta |
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Answer» Mitochondria is the power house of the cell Mitochondria are the primary source of ATP for placental growth, transport, and hormone synthesis. However, to date, little is known about the developmental regulation or functional significance of placental mitochondria during normal or suboptimal intrauterine conditions, such as oxygen deprivation (hypoxia) |
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| 361. |
What is ionic bond give example |
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Answer» For example NaCl , CaCl2 Ionic bond is a chemical bond bw 2 atoms which involves transfer of electron. The ionic bond always takes place bw metals and nonmetals. For example NaCl , NaOH. Ionic bonding is the complete transfer of valence electron(s) between atoms. Ionic bond will take place between metals and non-metals. for example NaCl sodium electronic configuration is 2,8,1 and electronic configuration of Cl is 2,8,7 sodium is a metal that means it will donate its one electron to become stable and the property of metal is also to loss electron to get positive charge and on the other hand Cl is non metal and the property of non metal is to gain electron so Cl will gain one electron from Na to become stable and Na will become stable by lossing one electron and Cl will become stable by gaining one electron so through this way they will form a IONIC BOND. similarly u can get more examples but remember to take one metal who has to loss 1 ,2,3, electrons and the same u have to take the non metal that will gain 1,2,3 electrons and therefore ionic bond is the bond in which metal and non metals are involved. Ionic bond is a kind of chemical bond which involves an electrostatic attraction between two oppositely charged ions because of the complete transfer of valence electrons between them.Examples of Ionic Bonds:1. Sodium chloride - NaCl - table salt2. Calcium chloride - CaCl2 – rock salt3. Sodium hydroxide - NaOH - Lye used in soap |
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| 362. |
Function of lungs |
| Answer» More informationWhat do the lungs do, and how do they function?Medically reviewed by Stacy Sampson, D.O. — Written by Tim Newman on June 27, 2018StructureFunctionThe alveoliSurfactantOther functionsRespiratory diseaseTips for good lung healthThe most important function of the lungs is to take oxygen from the environment and transfer it to the bloodstream.Taking more than 6 million breaths per year, the lungs affect every aspect of our bodies and health.This article looks at the form and function of the lungs, diseases that affect the lungs, and how to maintain healthy lungs.Fast facts on the lungsThe left and right lungs are different sizes.The lungs play a part in many functions, including regulating the acidity of the body.Smoking tobacco is the biggest cause of lung-related complaints.Preventive and lifestyle measures can help keep the lungs healthy.StructureThe lungs not only enable us to breathe and talk, but they also support the cardiovascular system and help maintain pH in the body, among others.The lungs are located in the chest, behind the rib cage on either side of the heart. They are roughly conical in shape with a rounded point at their apex and a flatter base where they meet the diaphragm.Although they are a pair, the lungs are not equal in size and shape.The left lung has an indentation bordering where the heart resides, called the cardiac notch. The right lung is shorter to allow space for the liver below.Overall, the left lung has a slightly smaller weight and capacity than the right.The lungs are surrounded by two membranes, known as the pulmonary pleurae. The inner layer directly lines the outer surface of the lungs, and the outer layer is attached to the inner wall of the rib cage.The space between the two membranes is filled with pleural fluid.FunctionA spirometry test can show how well the lungs are working.The lungs’ main role is to bring in air from the atmosphere and pass oxygen into the bloodstream. From there, it circulates to the rest of the body.Help is required from structures outside of the lungs in order to breathe properly. To breathe, we use the muscle of the diaphragm, the intercostal muscles (between the ribs), the muscles of the abdomen, and sometimes even muscles in the neck.The diaphragm is a muscle that is domed at the top and sits below the lungs. It powers most of the work involved in breathing.As it contracts, it moves down, allowing more space in the chest cavity and increasing the lungs’ capacity to expand. As the chest cavity volume increases, the pressure inside goes down, and air is sucked in through the nose or mouth and down into the lungs.As the diaphragm relaxes and returns to its resting position, the lung volume decreases because the pressure inside the chest cavity goes up, and the lungs expel the air.The lungs are like bellows. As they expand, air is sucked in for oxygen. As they compress, the exchanged carbon dioxide waste is pushed back out during exhalation.When air enters the nose or mouth, it travels down the trachea, also called the windpipe. After this, it reaches a section called the carina. At the carina, the windpipe splits into two, creating two mainstem bronchi. One leads to the left lung and the other to the right lung.From there, like branches on a tree, the pipe-like bronchi split again into smaller bronchi and then even smaller bronchioles. This ever-decreasing pipework eventually terminates in the alveoli, which are little air sac endings.Here, gas exchange occurs. | |
| 363. |
Calculate the area of cross section of a wire if its length is 1.0m its resistance is 23ohm |
| Answer» I = 1.0 mR = 23 ohmp = 1.84 × 10-6 ohm – meterWe haveR = P. I/A23 = 1.84 × 10-6 × 1/AA = (1.84 × 10-6 )/23= 0.08 × 10-6 m2= 8 × 10-8 m2 | |
| 364. |
Mention any 3 methods adopted by plants to minimise the transpiration rate |
| Answer» Plants reduce water loss by closing their stomata, developing thick cuticles, or by possessing leaf hairs to increase the boundary layer.i) The stomata are the primary control mechanisms that plants use to reduce water loss and they are able to do so quickly. Stomata are sensitive to the environmental cues that trigger the stomata to open or close.\xa0Some plant species have stomata on both sides of the leaf while others have stomata on the lower leaf surface to minimize water loss. Special cells called guard cells control each pore’s opening or closing. When stomata are open, transpiration rates increase; when they are closed, transpiration rates decrease. Stomata are the only way plants can control transpiration rates in the short-term.ii) The boundary layer is a thin layer of still air hugging the surface of the leaf. This layer of air is not moving. For transpiration to occur, water vapor leaving the stomata must diffuse through this motionless layer to reach the atmosphere where the water vapor will be removed by moving air. The larger the boundary layer, the slower the rates of transpiration. Plants can alter the size of their boundary layers around leaves through a variety of structural features. Leaves that possess many hairs or pubescence will have larger boundary layers; the hairs serve as mini-wind breaks by increasing the layer of still air around the leaf surface and slowing transpiration rates. Some plants possess stomata that are sunken into the leaf surface, dramatically increasing the boundary layer and slowing transpiration. Boundary layers increase as leaf size increases, reducing rates of transpiration as well.iii) The cuticle is the waxy layer present on all above-ground tissue of a plant and serves as a barrier to water movement out of a leaf. Because the cuticle is made of wax, it is very hydrophobic; therefore, water does not move through it very easily. The thicker the cuticle layer on a leaf surface, the slower the transpiration rate. Cuticle thickness varies widely among plant species. In general, plants from hot, dry climates have thicker cuticles than plants from cool, moist climates. In addition, leaves that develop under direct sunlight will have much thicker cuticles than leaves that develop under shade conditions. Sun leaves have much thicker cuticles than shade leaves causing slower rates of transpiration. | |
| 365. |
Class 10 hereditary and evolution notes |
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Answer» Heredity and Inherited Traits: Mendel’s Experiment; *** determination.Heredity refers to the transmission of characters from parents to offsprings. An inherited trait is a particular genetically determined feature that distinguishes a person from the others for example; attached or free ear lobes in human beings.Rules for the inheritance of traits:Mendel’s contribution: The rules for inheritance of traits in human beings are related to the fact that both mother and father contribute an equal amount of genetic material i.e. DNA to their offspring. So an offspring will get two versions of that trait from the two parents. Mendel worked out rules for inheritance of these traits. Gregor Johann Mendel regarded as the ‘Father of Genetics’ performed his experiments with garden peas (Pisum sativum) in the garden behind his monastery. He observed a number of contrasting characters in garden peas and observed their inheritance.Some important terms1. Chromosomes are long thread-like structures present in the nucleus of a cell which contain hereditary information of the cell in the form of genes.2. DNA is a chemical in the chromosome which carries the traits in a coded form.3. Gene is the part of a chromosome which controls a specific biological function.4. Contrasting characters: A pair of visible charactes such as tall and dwarf, white and violet flowers, round and wrinkled seeds, green and yellow seeds etc. 5. Dominant trait: The character which expresses itself in a (Ft) generation is dominant trait. Example : Tallness is a dominant character in pea plant.6. Recessive trait: The character which does not express itself but is present in a generation is recessive trait. Ex. dwarfism in the pea plant.7. Homozygous: A condition in which both the genes of same type are present for example; an organism has both the genes for tallness it is expressed as TT and genes for dwarfness are written as tt.8. Heterozygous: A condition in which both the genes are of different types for example; an organism has genes Tt it means it has a gene for tallness and the other for dwarfness only tall character is expressed.9. Genotype: It is genetic make up of an individual for example; A pure tall plant is expressed as TT and hybrid tall as Tt.10. Phenotype: It is external appearance of the organism for example; a plant having Tt composition will appear tall although it has gene for dwarfness.11. Homologous pair of characters are those in which one member is contributed by the father and the other member by the mother and both have genes for the same character at the same position.Mendel’s Experiment: Mendel started his experiment on the pea plants. He conducted first monohybrid and then dihybrid crosses. Monohybrid Cross: The cross in which Mendel showed inheritance of dominant and recessive characters is monohybrid cross.To observe inheritance of single pair of contrasting characters he took pure tall (genotype TT) and pure dwarf (genotype tt) pea plants and cross pollinated them to obtain first generation or first filial generation. In this figuration (F1 generation) he obtained only tall plants. This meant that only one of the parental traits was seen, not the mixture of the two. The plants of F generation or progeny are then self pollinated to obtain F2 generation or progeny. Now all plants were not tall. He obtained 75% tall plants and 25% dwarf plants i.e. the phenotypic ratio was 3:1. This indicates that in the F, generation both tall and dwarf traits were inherited but tallness expressed it self. Tallness is a dominant trait and dwarfness is a recessive trait. F2 generation has a genotypic ratio of 1 : 2 : 1 of three types of plants represented by TT, Tt and tt as shown in the cross.Conclusion: Phenotypic ratio—Tall : Dwarf 3 : 1Genotype ratio—Pure Tall : Hybrid Tall : Pure Dwarf 1 : 2 : 1 Law of Dominance: When parents having pure contrasting characters are crossed then only one character expresses itself in the Ft generation. This character is the dominant character and the character/factor which cannot express itself is called the recessive character.Dihybrid Cross: Mendel also carried out experiments to observe inheritance of two pairs of contrasting characters, which is called dihybrid cross. He cross breed pea plants bearing round green seed with plants bearing wrinkled and yellow seeds. In the Fx generation he obtained all round and yellow seeds it means round and yellow traits of seeds are dominant features while wrinkled and green are recessive. He self-pollinated the plants of F: generation to obtain F2 generation, he obtained four different types of seeds round yellow, round green, wrinkled yellow and wrinkled green in the ratio of 9 : 3 : 3 : 1. He concluded that traits are independently inheritedConclusionRound and yellow seeds-9.Round and green seeds-3.Wrinkled and yellow seeds-3.Wrinkled and green seeds-1.How do traits get expressed?Cellular DNA is the information source for making proteins in the cell.A part of DNA that provides information for one particular protein is called a gene for that protein for example; the height of a plant depends upon the growth hormone which is in turn controlled by the gene. If the gene is efficient and more growth hormone is secreted the plant will grow tall. If the gene for that particular protein gets altered and less of it is secreted when the plant will remain short. Both the parents contribute equally to the DNA of next generation during sexual reproduction. They actually contribute a copy of the same gene for example; when tall plant is crossed with short plant the gametes will have single gene either for tallness or for shortness. F1 generation will get one gene for tallness and other for shortness also.Each gene set is present, not as a single long thread of DNA, but as separate independent pieces each called a chromosome. Each cell gets two copies of the chromosome, one from each parent. Each germ cell or gamete has one copy of it because there is reductional division in the *** organs at the time of formation of gametes. When fertilization takes place normal number of chromosomes is restored in the progeny ensuring the stability of DNA of the species.Charles Darwin’s Idea of Evolution: His concept of evolution was based on the idea that new species were formed due to variations that occurred in the organisms Nature played an important role in selecting the organisms having suitable variations.Speciation: It means the development of one or more species from an existing species The factors that could lead to rise of a new species are :Gene flow: It means the exchange of genetic material by interbreeding between populations of the same species or between individuals within a population. It increases the variation in the genetic composition of a population.Genetic drift: It is random change in the frequency of alleles in a populate over successive generation due to errors in the gametes. The process is rapid in smaller population. Genetic drift can lead to accumulation of changes in the generations.Natural selection: According to Darwin, natural selection also plays an important role in bringing about evolution of new species of plants and animals. According to him variations existed between the individuals of a population and some natural phenomena eliminated those individuals which were less adapted. The surviving population would pass the hereditary advantageous features to their offsprings. With time this process would give rise to organisms different from the original population and new species are formed.Isolation: When a population of a species splits into two, it cannot reproduce with each other and forms a new species, for example; when a population of beetles feed on bushes on a mountain range, some may start feeding on nearby bushes finding entry into a new subpopulation. They reproduce with them so genes enter in a new population. Ultimately the two groups will be incapable of reproducing with each other and new species will be formed.Evolution and Classification: The organisms show certain features, like appearance and behaviour which are called characteristics for example; Plants can perform photosynthesis. The basic characteristics are shared by a large number of organisms. More characteristics which two species have in common more closely are related, if they are more closely related then they have common ancestors (explain the example of brother sister and cousins). Evolutionary relationships can be traced with the help of the following :Homologous organs: Those organs which have the same basic structural design and developmental origin but perform different functions and appearance, for example; Forelimbs of frog, lizard, bird, bat and human beings. They have same design of bones but they perform different functions. Why should a magnesium ribbon be cleard before burning in air? |
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| 366. |
How are the modes of reproduction different in unicellular and multicellular organisms? |
| Answer» \tUnicellular organisms generally divide by asexual reproduction which involves budding, binary fission, multiple fission, fragmentation, spore formation.\tMulticellular organisms can divide by sexual as well as asexual methods. For example, vegetative propagation in all plants is a means of asexual reproduction while all higher animals reproduce sexually. | |
| 367. |
Name each part of longitudinal section of flower and give at least one function of each. |
| Answer» The flower consists of both; male as well as female reproductive parts. The female reproductive part of the flower is known as pistil or carpel. Each carpel is made up of stigma, style and ovary. Male reproductive parts of flower are known as stamens.solution | |
| 368. |
How is the process of fertilization different from pollination? |
| Answer» Pollination is the transfer of pollen from the anther (male organ of the flower) to the stigma (female organ of the flower) of the same or different flower. Fertilization occurs once the pollen grain reaches the stigma, it produces a pollen tube, which grows down through the style to the ovary. The pollen tube expands down the style to the opening of the ovary and deposits the male gamete at the egg. The male and egg each contain half of the genetic material needed to form a zygote which later develops into a new plant. | |
| 369. |
Which part get reduced in chapter carbon and its compounds pages by |
| Answer» Nomenclature of carbon... | |
| 370. |
Write the function of the hormone secreted by pancreas |
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Answer» This chapter is not there in exams 1) INSULIN .FUNCTION :- Controls carbohydrates metabolism, it\'s deficiency causes diabetes mellitus .2) GLUCAGONFUNCTION :- Release of sugar from leaver.\xa0 Pancrease secrete a insulin which maintains the sugar level in our body |
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| 371. |
What is electric power? write it\'s si unit |
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Answer» the electric power is defined as the rate of change of electric energy It is defined as a rate of change of electric energy is called electric power. Its S. I. unit is watt |
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| 372. |
Define magnification. |
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Answer» it can be said that how big or small the image appears with respect to the object is called\xa0magnification\xa0of the object. It is represented as the ratio of the height of the image to the ratio of the height of the object. Magnification is ratio between height of image(h\') and height of object (h) and it also define as a ratio between image distance (v) by object distance (u) is called magnification Magnification is defined as the ratio of height of the image to the height of the object. It tells us the amount by which the object is magnified with respect to the object. |
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| 373. |
Explain different types of artificial propagation with diagram? |
| Answer» 36767793190_7e070f8964_o.png268×516\xa0\tThe process of growing many plants from one plant by man - made methods is called artificial propagation of plants.\tThe three common methods for the artificial propagation of plants are : a) Cutting b) Layering and c) Grafting.\ta) Cutting:\xa0A small part of a plant which is removed by making a cut with a knife is called cutting. A cutting may be a piece of stem, root or even to a leaf. Eg: Rose, Bougainvillia, Sugarcane, Banana, etc.\tb) Layering:\xa0In Layering a branch of the plant with at least one node is bent towards the ground and a part of it is covered with moist soil leaving the tip of the branch exposed above the ground.\tAfter sometime, new roots develop from the part of the branch buried in the soil. The branch is then cut off from the parent plant. Eg: Nerium, Hibiscus.\tc) Grafting:\xa0In grafting two plants are joined together in such a way that two stems join and grow as a single plant. Eg : Mango, Citrus, Apple, Rose, etc. | |
| 374. |
Explain different types of artificial propagation with diagram |
| Answer» The process of growing many plants from one plant by man-made methods is called artificial propagation. The three common methods of artificial propagation are:\xa0\tCuttingA small part of a plant which is removed by making a cut with a sharp knife is called cutting. Example - rose.LayeringIn this method, a branch of the plant is pulled towards the ground and a part of it is covered with moist soil leaving the tip of the branch exposed above the ground. After some time, new roots develop from the part of the branch buried in the soil. The branch is then cut off from the parent plant. The part of the plant which has developed roots grows to become new plant. Example - Jasmine plant.GraftingGrafting is the method in which cut stems of two different plants are joined together in such a way that the two stems join and grow as a single plant. The cut stem of a plant having roots is called stock whereas the cut stem of another plant without roots is called scion.\t\xa0 | |
| 375. |
Explain the reproduction process in plants. |
| Answer» In plants, reproduction is carried out via two modes:\tAsexual Mode – New plants are obtained without producing seeds\tSexual Mode – New plants are obtained from seeds. | |
| 376. |
If angle of incidence is equal to angle of refraction in a transparent slab then the value of i is |
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Answer» 0degrees It will be 0 if the slab is made of a medium other than air, then the value of I=r= 0 , I.e. it is normal incidence for any value of refractive index. |
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| 377. |
What is gum and resin. |
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Answer» Waste product of plants Waste product of plant which is occur in old xylem cell Gums and resins are the waste products of plants. |
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| 378. |
Expalin the mechanism of transportation of water and minerals and food in plants. |
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Answer» Xylem transports water and minerals obtained from the soil.Phloem transports products of photosynthesis from the leaves to other parts of the plant.Vessels, tracheids of the roots, stems and leaves are connected to form a continuous system in xylem cells to transport water to all the parts of the plants.Cells in the roots which are in contact with the soil take up ions which creates a difference of concentration between the roots and the soil and therefore water moves to the roots to eliminate the difference.Water is moved into xylem of roots and from where it is pushed upward.Plants use different mechanisms to pull water upwards through xylem like-\tWater which is lost through stomata is replaced by water absorbed by the roots.\tEvaporation of water from leaf creates a suction force which pulls water.The loss of water in the form of water vapor is called The water from the soil reaches the leaves by the tissue called Xylem. The root hairs on the root absorb water from the soil and through osmosis the water is transported to leaves through the tissue xylem. |
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| 379. |
What is the difference between potential difference and electric potential |
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Answer» Electrical potential is the amount of work done in moving a unit positive charge from infinity to that point.. Potential difference is the amount of work done in moving a unit positive charge from one point to another.. •Electric potential at a point A in an electric field is the work done per unit positive charge in transporting it from infinitely far away to the point A.•Potential difference between two points is defined as the work done in carrying a unit positive charge from one point to another point |
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| 380. |
Explain why the plants do not twinkle |
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Answer» Because of total variation in the amount of light..the light come form planets is nullifying.... thereby the planets do not twinkle Unlike\xa0stars\xa0that\xa0twinkle\xa0at night, planets do not. Instead they shine steadily due to the distance between these planets. Unlike\xa0stars\xa0that are so\xa0far away\xa0from earth that even in the most powerful of telescopes they look merely like\xa0dots\xa0or\xa0points\xa0and appear to\xa0twinkle\xa0due to “refraction” when they enter the earth’s atmosphere.\xa0But\xa0planets\xa0are much more\xa0closer\xa0to earth. Their appearance is that of\xa0tiny disks\xa0through telescopes. When the light from these planets enters the earth’s atmosphere they also go through refraction. But light from both the ends of the planet, travel away from each other in opposite direction, thus\xa0cancelling\xa0each other’s effects. So they appear steadily instead of twinkling like stars. Because they do not create light... I guess I\'m not sure Plants or planets |
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| 381. |
In which chapter totally deleted in science |
| Answer» Control and coordination. And sources of energy | |
| 382. |
name the organs which secreates the following enzymes in human digestive system 1.pepsin 2.Tripsin |
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Answer» pepsin is realsed by stomach to brekdown yhe protien into simpler compound and2. tripsin is realsed by pancrese the function of tripsin i don\' t know Pepsin by stomach lining and Trypsin by Pancras Pepsin - stomach liningTripsin - pancreas Pepsin by chief cell of stomach Tripsin by pancreas |
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| 383. |
Explain the process of digestion in human beings with a well labelled diagram |
| Answer» The human digestive system is a series of organs that converts food into essential nutrients that are absorbed into the body. The digestive organs also move waste material out of the body.The enzymes in saliva help break down foods, and the lubrication function of saliva makes it easier for food to be swallowed.The stomach\'s gastric juice, which is primarily a mix of hydrochloric acid and pepsin, starts breaking down proteins and killing potentially harmful bacteria.The liver has a wide range of functions, including detoxification, protein synthesis and production of bile for digestion.The function of the large intestine, which is about five feet long (1.5 meters), is primarily the storage and fermentation of indigestible matter.Related: | |
| 384. |
Explain the hormones in human |
| Answer» Hormones are secreted in the body by several glands that are essential for the growth, development, reproduction, etc. They are\xa0the chemical substances which coordinate the activities of living organisms and also their growth. They are secreted by special tissues in our body through endocrine glands.\xa0 | |
| 385. |
What will happen if a solution of sodium hydrocarbonate is heated? |
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Answer» ok thankyou so much friends for your answers Sorry ,atlast it is co² Reaction held when sodium hydrocatbonate is heated -------------------- 2NaHCO³ ---(Heat) -----Na²CO³ + H²O+ CO³ \xa0When a solution of sodium hydrocarbonate is heated, sodium carbonate and water are formed with the evolution of carbon dioxide gas.2NaHCO3−→−Heat Na2CO3\xa0+ H2O + CO2 |
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| 386. |
What is the formula of formic acid ? |
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Answer» HCOOH HCOOH HCOOH formula of formic acid Formula of formic acid is CH₂O₂ Formic acid, systematically named methanoic acid, is the simplest carboxylic acid, and has the chemical formula HCOOH. It is an important intermediate in chemical synthesis and occurs naturally, most notably in some ants.\xa0Formic acid (HCO2H), also called methanoic acid, the simplest of the carboxylic acids, used in processing textiles and leather.\xa0The principal\xa0use\xa0of\xa0formic acid\xa0is as a preservative and antibacterial agent in livestock feed. When sprayed on fresh hay or other silage, it arrests certain decay processes and causes the feed to retain its nutritive value longer.\xa0Formic acid\xa0appears as a colorless liquid with a pungent odor.\xa0 |
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| 387. |
What is Potential electricity |
| Answer» Electric potential, the amount of work needed to move a unit charge from a reference point to a specific point against an\xa0electric\xa0field.\xa0The\xa0potential difference\xa0(which is the same as\xa0voltage) is equal to the amount of current multiplied by the resistance. A\xa0potential difference\xa0of one Volt is equal to one Joule of energy being used by one Coulomb of charge when it flows between two points in a circuit.\xa0In any\xa0electric\xa0field there are two points of\xa0electric potential\xa0that are of significant interest to us. There\'s a point of\xa0high potential, where a positive charge would have the highest possible\xa0potential\xa0energy, and there\'s a point of low\xa0potential, where a charge would have the lowest possible\xa0potential\xa0energy. | |
| 388. |
Multicellular binary fussion example |
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Answer» Yeast is an example of it. on any multicellular orga. are do binary fussion Yeast |
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| 389. |
What are amphotric oxides? |
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Answer» Amphoteric oxides are such oxides which reacts with acid as well as base The element which react with acid and base such oxides which react with acid as well as base and produced salt and water for ex;- aluminium oxide and zinc oxide Amphoteric oxides r thodes oxides which show both acidic as well as basic behaviour Which shows its nature as acid as well as base such as silicon |
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| 390. |
Write the electron dot structure of sodium oxygen and magnesium |
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Answer» Thnks Na• ➡️ sodium ••••O••➡️ oxygen •••M•➡️ magnesium |
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| 391. |
observation of activity 1.2 class 10 |
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Answer» Observation:A yellow precipitate of lead iodide will be produced. this activity shows that the example of double displacement reaction Brief procedure:\xa0Activity 1.2 asks us to mix an aqueous solution of lead nitrate with potassium iodide to check what happens.Observation:\xa0A yellow colour precipitate appears at the bottom.Explanation:\xa0Lead nitrate and potassium iodide; both are colourless. They react with each other to form a yellow precipitate of lead iodide. Lead iodide settles down at the bottom of the tube.Pb(NO3)2(aq)+ 2KI(aq) → PbI2(s) + 2KNO3(aq) |
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| 392. |
A wire is drawn such that its radius changes from r to 2r , then new resistence is |
| Answer» R2=1/4×R1 | |
| 393. |
What do you mean by ejaculation? |
| Answer» Ejaculation\xa0is a physiological\xa0process\xa0heavily controlled by the autonomic nervous system. It consists of two main phases: emission and expulsion. The main organs involved in\xa0ejaculation\xa0are the distal epididymis, the vas deferens, the seminal vesicle, the prostate, the prostatic urethra, and the bladder neck.\xa0Ejaculate\xa0contains fluid from the prostate, seminal vesicles, and bulbourethral glands. Though it contains a wide variety of substances, including citric acid, cholesterol, mucus, and water, its primary job is to deliver\xa0sperm. | |
| 394. |
Diffraction |
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Answer» Thanks Diffraction\xa0refers to various phenomena that occur when a wave encounters an obstacle or a slit. It is defined as the bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow of the obstacle/aperture. |
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| 395. |
Write the names of the reactants taking part in the chemical reaction during the demonstration. |
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Answer» Mention the question well ... Geururitir |
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| 396. |
How the human heart works? |
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Answer» The right side of your\xa0heart\xa0receives oxygen-poor blood from your veins and pumps it to your lungs, where it picks up oxygen and gets rid of carbon dioxide. The left side of your\xa0heart\xa0receives oxygen-rich blood from your lungs and pumps it through your arteries to the rest of your body. In our heart there are 4 chambers named left and right auricle, left and right ventricle. De-oxygnated blood from body parts enter left auricle and through left auricle yo left ventricle and then pumped to lungs. And from lungs blood enter right auricle and through right auricle to right ventricle and then blood is again transported to body parts |
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| 397. |
What are the genes |
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Answer» Group of related species A gene is a small portion of the DNA, with codes for a particular polypeptide or a protein. In other words, it is the functional unit of the DNA. It is also responsible for the transmission of hereditary characters from the parents to the offspring. |
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| 398. |
What to do to see full name of the chapter and it is there for exam or not |
| Answer» what is your questions | |
| 399. |
Based on which principle galvanometer is made of |
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Answer» Fleming right hand rule Acid base and salt |
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| 400. |
Functioning of nephrons. |
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Answer» Filtration A\xa0nephron\xa0is the basic structural and\xa0functional\xa0unit of the kidneys that regulates water and soluble substances in the blood by filtering the blood, reabsorbing what is needed, and excreting the rest as urine. Its\xa0function\xa0is vital for homeostasis of blood volume, blood pressure, and plasma osmolarity.\xa0The nephron uses four mechanisms to convert blood into urine:\xa0filtration,\xa0reabsorption,\xa0secretion, and\xa0excretion. These apply to numerous substances. |
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