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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.
| 64451. |
Biomass energy |
| Answer» Where is your question | |
| 64452. |
what is homologous?????? |
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Answer» Homologous means similar in structure but different in the function. ....analogous means different in structure but similar function. .. An organism which contains identical copies of a gene |
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| 64453. |
How are the ecosystem grouped? |
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Answer» Levels of Organization in an EcosystemecosystemIndividual, Species, Organism: An individual is any living thing or organism. Individuals do not breed with individuals from other groups. Animals, unlike plants, tend to be very definite with this term because some plants can cross-breed with other fertile plants.In the diagram above, you will notice that Gill, the goldfish, is interacting with its environment, and will only crossbreed with other gold fishes just like her.ecosystemPopulation: A group of individuals of a given species that live in a specific geographic area at a given time. (example is Gill and his family and friends and other fishes of Gill’s species) Note that populations include individuals of the same species, but may have different genetic makeup such as hair/eye/skin colour and size between themselves and other populations.ecosystemCommunity: This includes all the populations in a specific area at a given time. A community includes populations of organisms of different species. In the diagram above, note how populations of gold fishes, salmons, crabs and herrings coexist in a defined location. A great community usually includes biodiversity.ecosystemEcosystem: As explained in the pages earlier, ecosystems include more than a community of living organisms (biotic) interacting with the environment (abiotic). At this level note how they depend on other abiotic factors such as rocks, water, air and temperature.ecosystemBiome: A biome, in simple terms, is a set of ecosystems sharing similar characteristics with their abiotic factors adapted to their environments.ecosystemBiosphere: When we consider all the different biomes, each blending into the other, with all humans living in many different geographic areas, we form a huge community of humans, animals and plants, and micro-organisms in their defined habitats. A biosphere is the sum of all the ecosystems established on planet Earth. It is the living (and decaying) component of the earth system. By tropic levelsProduces -Consumer - |
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| 64454. |
How to pronouce Aluminium |
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Answer» Its called Al-u-mini-um एल्युमीनियम |
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| 64455. |
How are the ecosystem formed |
| Answer» An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms. Abiotic factors include rocks, temperature, and humidity.Every factor in an ecosystem depends on every other factor, either directly or indirectly. A change in the temperature of an ecosystem will often affect what plants will grow there, for instance. Animals that depend on plants for food and shelter will have to adapt to the changes, move to another ecosystem, or perish. | |
| 64456. |
What is flux and slag? |
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Answer» Slag is the waste material which is removed. It metalurgy, substance used to remove or prevent the formation. Flux is the substance added to molten metals to bond with impurities that can be readily removed. |
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| 64457. |
Why substance burn with or without flame |
| Answer» . We all must have seen a burning candle and found that it burns with a flame giving out heat and light. Imagine burning a piece of coal. Coal too burns in air producing carbon dioxide, heat and light. But it does not produce any flame. So why do some substances produce flame while others don’t?flame1The chemical process in which a substance reacts with oxygen to give off heat is called combustion. Substances that undergo combustion are called combustible substances. It may be a solid, liquid or gas. Along with heat, some produce flame or glow. The substances which vaporize during burning give flames. For example combustion of kerosene oil produces flame. On the other hand certain substances like coal do not vaporize and hence doesn’t produce a flame.flame2A side effect of the chemical reactions (that takes place while a substance is burning) is a lot of heat. The chemical reactions in a fire generate a lot of new heat that sustains the fire. Many fuels like gasoline burn in one step. Heat vaporizes gasoline and it all burns as a volatile gas. There is no char. A candle on the other hand slowly vaporizes. As they heat up, the rising carbon atoms emit light. This "heat produces light" effect is called incandescence. This is what causes the visible flame. Flame color varies depending on what is burnt and how hot it is.Imagine burning a piece of wood. Some of the decomposed material is released as volatile gases. These gases form smoke. Smoke is compound of hydrogen, carbon and oxygen. The rest of the material forms charcoal, which is nearly pure carbon, and ash, the unburnable minerals in the wood (calcium, potassium, and so on). Charcoal is wood that has been heated to remove nearly all of the volatile gases and leave behind the carbon. That is why a charcoal fire burns with no smoke. | |
| 64458. |
Explain briefly importance of variations ? |
| Answer» Variations are some difference between parent and child of a species which reproduce sexually. Variations are very important as it leads to evolution of new species. It also helps in survivability of species in exterme condition | |
| 64459. |
What do you mean by double fertilization? |
| Answer» The process in which the two sperm nuclei of a pollen grain unite with nuclei of the embryo sac of an angiosperm plant. One sperm nucleus unites with the egg to form the diploid zygote, from which the embryo develops. The other sperm unites with the two nuclei located in a single cell at the center of the embryo sac. Together these nuclei form the triploid nucleus of the cell from which the endosperm develops. Double fertilization in this form is unique to the angiosperms. | |
| 64460. |
What is active link? In computer.?????☺️☺️☺️☺️☺️ |
| Answer» 1) An active text or graphic link on a Web page. Clicking the link redirects the user to another Web page or a document or image. Live links are also placed into email, allowing recipients of the message to immediately go to a website or open an attached document or image. In this context, live link is contrasted with a URL that is printed or displayed. If the URL text is in electronic form, it must be copied and pasted into a Web browser to function as a link. See hypertext, hypergraphic and URL.(2) A text or graphic link that redirects the user to a website, document or image that does, in fact, exist. In this context, live link is contrasted with dead link. | |
| 64461. |
Specify 3 rules of nomenclature of organic compound? |
| Answer» Pls gave me your no. | |
| 64462. |
Define 1.)genetic drift2.)speciation3.)heridity4.)natural selection |
| Answer» 1. Genetic drift:- variation in the relative frequency of different genotypes in a small population, owing to the chance disappearance of particular genes as individuals die or do not reproduce.?????2. Speciation:- the formation of new and distinct species in the course of evolution.?????3. Heridity:- the passing on of physical or mental characteristics genetically from one generation to another. ?????4. Natural selection:- the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin, and it is now regarded as be the main process that brings about evolution.☺️☺️☺️☺️☺️☺️☺️☺️☺️ | |
| 64463. |
What is a precipitate? |
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Answer» Precipitation is the creation of a solid from a solution. When the reaction occurs in a liquid solution, the solid formed is called the \'precipitate\'. The chemical that causes the solid to form is called the \'precipitant\'. ☺️☺️☺️☺️☺️????????????????????? The white coloured substance formed during precipitation reaction. |
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| 64464. |
Of what color avtive link is? In compute. ?????????? |
| Answer» Blue....? | |
| 64465. |
What are the two reasons when leaves are boiled in alcohol to test for the presence of starch? |
| Answer» The hot water kills the leaf and the alcohol breaks down the chlorophyll, taking the green color out of the leaf. When you put iodine on the leaves, one of them will turn blue-black and the other will be a reddish-brown. Iodine is an indicator that turns blue-black in the presence of starch. The leaf that was in the light turns blue-black, which demonstrates that the leaf has been performing photosynthesis and producing starch. | |
| 64466. |
Describe the aerobic and anarobic respiration along with reactions |
| Answer» The respiration takes place uses oxygen is called aerobic respiration.Respiration takes place in absence of oxygen is called anaerobic respiration. | |
| 64467. |
How does respiration take place in plants |
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Answer» \tPlants exchange gases through stomata.\tThe large inter-cellular spaces ensure that all the cells are in contact with air.\tCarbon dioxide and oxygen are exchanged in and out of the cells by the process of\tDiffusion is directed by environmental conditions and the requirements of the plants.\tDuring night, in the absence of sunlight photosynthesis do not take place and hence carbon dioxide is released but not used up by the plants.\tDuring the day, there is no carbon dioxide release because the released carbon dioxide is used up by the plants for photosynthesis.\tOxygen is released instead of carbon dioxide during the day. Respiration takes place in plants in stem , wood , leaves Read the book and find out the answer Do some effort???? |
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| 64468. |
What is hemoglobin? Wher it is found |
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Answer» It carries oxygen in our whole body present in our blood. So short ans please gave long ans Hemoglobin is a red pigment present in RBC to show the red color of blood. It is made up of protien. The hemoglobin is used for carrying oxygen in the whole body via blood. |
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| 64469. |
What is diverging mirror |
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Answer» It is concave mirror Diverging mirror:- The diverging mirror is also known as the convex mirror. When the light rays fall on the mirror it will diverge the light rays. It is used in vechicle mirror bcz it will give image of wider area in comparasion of concave mirror. Another reason to use convex mirror is that it will show small size of image to understand properly. |
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| 64470. |
Draw a labelled diagram of palisade leaf |
| Answer» | |
| 64471. |
Describe respiration in fish . |
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Answer» Respiration in fish takes with the help of gills. Most fish possess gills on either side of their head. Gills are tissues made up of feathery structures called gill filaments that provide a large surface area for gas exchange. A large surface area is crucial for gas exchange in aquatic organisms as water contains very little amount of dissolved oxygen. The filaments in fish gills are arranged in rows in the gill arch.\xa0Each filament contains lamellae, which are discs supplied with capillaries. Blood enters and leaves the gills through these small blood vessels. Although gills in fish occupy only a small section of their body, the immense respiratory surface created by the filaments provides the whole organism with an efficient gas exchange. Through gills they can respirate |
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| 64472. |
Why resistance is less in parallel combination |
| Answer» When resistors are connected in parallel, more current flows from the source than would flow for any of them individually, so the total resistance lowers. | |
| 64473. |
Good morning How many covalent bond in ethane with the molecular fomula C2H6 |
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Answer» 2 Here is 1 C-C and 6 C-H bond Ethane has seven covalent bonds. 6 C-H bonds and 1 C-C bond. Single bond |
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| 64474. |
Describe nomencleature |
| Answer» International Union of Pure and Applied Chemistry (IUPAC) decided some rules to name the carbon compounds. This was done to maintain the uniformity throughout the world. Names which are given on this basis are popularly known as IUPAC name. The rules for nomenclature are as follows:Identify the number of carbon atoms in carbon compound. Name the carbon compounds according to the number of carbon atoms.Example: Saturated hydrocarbon having one carbon atom is named as Methane. Saturated hydrocarbon having two carbon atoms is named as Ethane. | |
| 64475. |
Define speciation.how speciation occures |
| Answer» Speciation is an event that splits a population by evolutionary means into two independent species which cannot reproduce among themselves. Speciation occurs when a population exhibits a continuous change due to changes in the environment. These unit changes get accumulated over a period of time in a section of population which slowly alter the individual\'s structure and functions to give rise to a new species. There are two types of speciation namely allopatric speciation and sympatric speciation.\xa0New species which arise due to speciation do not interbreed with parents.Individuals of a species if geographically isolated in a new environment, they grow into new species by developing some adaptations. | |
| 64476. |
Differences between budding and fission.(3 pts) |
| Answer» \t Fission Budding1. Fission is a division of an organism into two (binary fission) or more than two (multiple fission) new organisms.1. Budding involves the enlargement of a vegetative part of body to form a bud which detaches from the parent body and forms a new organism.2. There is no proliferation of any vegetative cells.3. A part of the parent buds off and forms daughter cells.3.The parent splits into the daughter cells2. There is proliferation of vegetative cells.\t\xa0 | |
| 64477. |
Differences between binary fission in amoeba and leshmania.(3 pts) |
| Answer» In amoeba, splitting of the cell into two\xa0during cell divison can take place in any plane. Binary Fission in Amoeba is a type of asexual reproduction shown by amoeba. Binary fission of Amoeba can happen in any place of the cell.Leishmania has a whip like structure at one end of the cell, hence binary fission occurs\xa0in a definite orientation in relation to this structure. Binary Fission in Leishmania is a type of asexual reproduction shown by leishamnia. Binary fission of Leishmania happens in a longitudinal plane. | |
| 64478. |
Syntific name of backing soda |
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Answer» Sodium hydrogen carbonate = NaHCO3 Sodium bicarbonate / sodium hydrogen carbonate calsiam corbanate |
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| 64479. |
What is the role of small intenstine in dogestion of food |
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Answer» The small intestine receives the secretion of : liver and pancreas. Liver secrets bile. It is stored in gall bladder ,greenish yellow in colour, help to emulsify or break the fats. Thus bile perform two function ....makes the acidic food alkline , bile salts break the fats . Pancreas is a large gland ,secrets pancreatic juice which contains digestive enzymes...pancreatic amylase(breaks starch) , trypsin( digesat protein) , lipase(break fat).........................................intestinal juice contains enzymes which digest carbohydrates into glucose, proteins into amino acid, and fats into fatty acid and glycerol.. .....the small intestine is the main region for the absorption of digested food .its inner surface have villi which provide a large surface area for rapid absorption..... that\'s it small intestine is thepart of alimentary canal where complete digestion of food takes place.different intestinel ymes are secreted by small intestine and it also receives the enzymes secreted by pancreas[trypsin,lipase], liver[bile juice] which coverts proteins into amino acids, carbohydrate into glucoseand fat into glycerol.then the digested food is absorbed by the villi present onthe inner surface of small intestine. the outer lining of small intestine has blood vessels which absorbs food. Small intestine plays an important role in digestion of food. As food is completely digested in small intestine. And the villi of small intestine absorb digested food and pass into blood vessel. |
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| 64480. |
What is crystallisation reaction |
| Answer» The process of formation of solid crystals from a homogeneous solution is called crystallization. It is a physical change.Ex: Formation of Copper sulphate crystals.The number of water molecules chemically combined in a definite molecular proportion with the salt in the crystalline state are called water of crystallisation.Salts that contain a definite number of water molecules as water of crystallisation are called hydrated salts.Example:\xa0Gypsum and washing soda.\xa0 | |
| 64481. |
What is maxwell right hand thumb rule called |
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Answer» The Maxwell right hand thumb rule indicates the direction of the magnetic field in a direction of current. If the thumb of the right hand points along the direction of current, then the remaining curled fingers of the same hand gives the direction of the magnetic field due to the current. When the position of the thumb will be upward, the curled fingers will be anti-clockwise and the magnetic field will be anti-clockwise too and vise varsa?????????? Maxwell right hand thumb rule is also called Maxwell corkscrew rule.According to this rule. Imagine that you are holding straight current carrying conductorin your right hand so that your thumb point in the direction of current,then the direction of your curved finger give the direction of magnetic field |
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| 64482. |
Short note on budding , fragmentation and regeneration |
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Answer» Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site.☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️Fragmentation:- the process or state of breaking or being broken into fragments.the storing of a file in several separate areas of memory scattered throughout a hard disk.??????????????Regenration:- In biology, regeneration is the process of renewal, restoration, and growth that makes genomes, cells, organisms, and ecosystems resilient to natural fluctuations or events that cause disturbance or damage. Every species is capable of regeneration, from bacteria to humans.☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️ Regeneration - The process of getting back a full organism from its body parts is called regeneration.Ex. Hydra and planeria Budding - In budding a small part of body of the parent organism as a bud which detached and become new organism. Ex. yeast and hydra.Fragnentation - The breaking up of the body of simple multicellular organism into two or more pieces on maturing, and then each organism growth completely and form new organism. |
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| 64483. |
Define the reactivity series of metals |
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Answer» KNaCaMgAlZn FePbH In chemistry, a reactivity series (or activity series) is an empirical, calculated, and structurally analytical progression[1] of a series of metals, arranged by their "reactivity" from highest to lowest. It is used to summarize information about the reactions of metals with acids and water, double displacement reactions and the extraction of metals from their ore . ???? |
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| 64484. |
Why does stars twinkle |
| Answer» The twinkling of a star is due to atmospheric refraction of starlight. The starlight, on entering the earth’s atmosphere, undergoes refraction continuously before it reaches the earth. The atmospheric refraction occurs in a medium of gradually changing refractive index. | |
| 64485. |
Light travels in the form of waves. If yes then prove |
| Answer» Light has dual nature .so,you cannot say that it travels only in the form of waves. It has also particle nature. | |
| 64486. |
Light is made up of particles. If yes then prove |
| Answer» In physicsLight is made up of both wave and particle . The modern theory of light is called quantum theory of light combines both the wave and particle model s of light | |
| 64487. |
Explain difference between the plane mirror, concave mirror and convex mirror. |
| Answer» If the image is upright, of same size as the object and it does not change in size when the mirror is moved, then the mirror is a plane mirror.If the image is upright, magnified and it becomes inverted when the mirror is moved away from the face, then the mirror is a concave mirror.If the image is upright and diminished and it remains upright when the mirror is moved away from the face, then the mirror is a convex mirror. | |
| 64488. |
Which is secondry sexual organs in female and why it is required? |
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| 64489. |
What is the reason behind it that human is good conductor to flow current? |
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Answer» Thnx for giving me answer....??? The human is good conductor of electricity because due to the presence of ions in human body |
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| 64490. |
Why veins have thick wall than articries |
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Answer» Because veins have high blood pressure than artery In arteries there is a lot more pressure, due to the force of blood being pumped outwards from the heart, so they need thicker walls in order to prevent bursting. In veins the pressure is much less, and so thinner walls are present. |
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| 64491. |
Difference between reflex action and walking? |
| Answer» Reflex actions are sudden, involuntary reactions of the body in response to stimuli. They occur without the involvement of the conscious areas of the brain. Therefore, all reflex actions are unconscious actions. Reflex actions occur both from the brain and spinal cord which are the parts of the central nervous system. Most often these actions are mainly formed from the spinal cord. When sudden responses are required, instructions are given by the spinal cord itself. Impulses reach the brain only after that. Later conscious responses are made.\xa0Walking is a voluntary action which happens under the control of cerebellum of the brain. Walking is aquired or learnt as we grow. The thought is accepeted by the brain upon necessity and is processed under its control. | |
| 64492. |
What is the need of periodic classification of elements |
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Answer» To make the study of elements easy Needof. Is no. Need. Is. There Cbse |
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| 64493. |
Define Arteries and veins |
| Answer» Arteries carry oxygenated blood from heart to different body parts .they are thick walled.Veins carry deoxygenated blood from different bpdy parts to the heart. They r thin walled. | |
| 64494. |
Catenation property of carbon and compounds |
| Answer» Self linking | |
| 64495. |
Explain left hand rule in science |
| Answer» In the left hand rule...The middle finger indicates the direction of current the forefinger indecates the direction of the magnetic field and the thumb indecate the motion of force exerts.These are all about the left hand rule.got it dear?? | |
| 64496. |
What is the definition of variable resistance |
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Answer» Variable resistance are those which we can the resistance. Ex fan regulator Variable Resistance: The component of an electric circuit which is used to regulate the current; without changing the voltage from the source; is called variable resistance. All rheostats are variable resistance but all variable resistance are not rheostats. Resistance like rheostat where we can change resistance |
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| 64497. |
Define the theory of evolution of species given by charles darwin |
| Answer» | |
| 64498. |
Write the difference between series connection and parallel connection. |
| Answer» In series the potential difference gets divided between the conductors and current remains same. In parallel current is divided between the conductors but potential difference remains same. | |
| 64499. |
Name the electorate at which aluminium metal is produce |
| Answer» Alumina, Bauxite and Cryolite | |
| 64500. |
What cause the wind flow? |
| Answer» The main cause of flow of wind is the uneven heating of wind at different regions. | |