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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 2601. |
Bacterial cells are termed as |
| Answer» <p>Bacterial cellshave two major compartments, the cytoplasm andcellenvelope, and may also have exterior appendages , such as flagella or pili</p> | |
| 2602. |
mometum( p) theory and gave example. |
| Answer» <p>Momentum theory concerns itself with the global balance of mass, momentum, and energy. It does not concern itself with details of the flow around the blades. It gives a good representation of what is happening from a view far away from the rotor. This theory makes a number of simplifying assumptions.For example: A car having mass moving towards north at a given velocity.</p> | |
| 2603. |
1. Who gave general theory of relativity? |
| Answer» <p>Albert Einstein</p><p>General relativity (GR, also known as the general theory of relativity or GTR) is the geometric theory of gravitation published byAlbert Einsteinin 1915 and the current description of gravitation in modern physics. </p> | |
| 2604. |
An inorganic compound contained 24.75% (w/w)potassium and 34.75% (w/w) manganeseand some other common element. Give theempirical formula of the compound (K 39u,Mn = 59u) |
| Answer» <p>let the mass of compound be 100gnow % potassium = 24.75 , so mass = 24.75 Then moles of potassium = 24.75/39 = 0.63 </p><p>and similarly moles of manganese = 34.75/59 = 0.58 </p><p>so, Moles of K and Mn are almost same .</p><p>=> emperical formula will be KMnX </p><p>where X => other common elements.</p> | |
| 2605. |
4. Comment on the following statements.a. Evaporation produces coolingb. Rate of evaporation of an aquous solution decreaseswith increase in humidityc. Sponge though compressible is a solid. |
| Answer» <p>Evaporationis acoolingprocess because when liquid turns to gas, it needs more energy, and so it has to take that energy from its surroundings. The energy is in the form of heat, and when the heat energy leaves with theevaporatingliquid, the surroundings getcooler.</p> <p>Humidity is basically the amount of water vapour in the air. And evaporation is the vaporization of water into water vapour. So when the humidity is high there are already plenty of water molecules in the air so the water which gets vapourized into water vapour takes time to fill the gaps in the atmosphere and thus rate of evaporation is slow. (It's like filling intermolecular space, only here the space isn't between molecules.)</p> | |
| 2606. |
In the circuit shown in figure, equivalent resistancebetween A and Bis(a) 8 Ω(b) 15 Ω(c) 3/2Ω(d) 2 Ω |
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| 2607. |
logo is a __________ language |
| Answer» <p>Logo is a programming language.</p><p>Explaination :Logo is a programming language that is easy to learn. It is used to teach students and children to program a computer</p> | |
| 2608. |
8. Razia conducted an experiment in the field related to the rate ofpercolation. She observed that it took 40 min for 200 mL of water topercolate through the soil sample. Calculate the rate of percolation. |
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| 2609. |
av)how aloila you show that sotliny ochangeTeacher's Signatur |
| Answer» <p>Once thecurdis formed, milk cannot be re-obtained from it. Also, both milk andcurdhave different properties. Since these are the properties of achemical change,setting of curd is a chemical change. ... Therefore, it is achemical change.</p> <p>If you want to become a doctor which hospital you will choose private or public</p> | |
| 2610. |
Name the longest cell of the human body |
| Answer» <p>It's cell, not bone </p> <p>neuron is the longest cell in body</p> <p>Neurons ..is the longest cell of the human body😊</p> | |
| 2611. |
What is lungs? |
| Answer» <p>The lungs are a pair of spongy, air-filled organs located on either side of the chest (thorax). Thetrachea(windpipe) conducts inhaled air into the lungs through its tubular branches, called bronchi. The bronchi then divide into smaller and smaller branches (bronchioles), finally becoming microscopic.</p> <p>The lungs are the primary organs of the respiratory system in human and many other animals including a few fish and some snails. In mammals and most other vertebrates two lungs are located near the backbone on either side of the heart .</p> | |
| 2612. |
GIve the differences between1. Invertebrate and Vertebrate animals2. Warm-blooded and Cold-blooded animals3. Protozoa and Porifera |
| Answer» <p>DIFFERENCES:1)Vertebrates have a backbone or spinal column, have an internal skeleton made of bone, an advanced nervous system with a developed brain and have outer covering of protective cellular skin.Invertebrates have no backbone, no cell walls. They are heterotrophic.Because of developed brains, vertebrates have better and faster understanding than invertebrates.2)Examples of vertebrates are humans, primates (gorillas, monkeys, orang-utans), marsupials (kangaroo, koala), reptiles (crocodiles, lizards, snakes), birds, seals, dolphins, mammals. Examples of invertebrates are insects, flatworms, jellyfish, flies.3)Vertebrates are stronger, faster and mostly bigger than the invertebrates. Invertebrates tend to be small and slow moving.4)2% of animal species are vertebrates. Rest 98% are invertebrates.5)There are 57,739 species of vertebrates. In comparison, there are 2 million species of invertebrates that have been identified . More remain to be identified.6)Vertebrates have only bilateral symmetry. Invertebrates have bilateral or radial symmetry.7)Vertebrates are classified into 5 groups; invertebrates into 30 phyla.</p> <p>3)Protozoa are single-celled animal-like organisms such as paramecium, amoebas, etc. Porifera is simply the phylum for sponges. Porifera means "pore bearer" because sponges have holes or pores in which they filter food from the water.</p> <p>Protozoa are single-celled animal-like organisms such as paramecium, amoebas, etc. Porifera is simply the phylum for sponges. Porifera means "pore bearer" because sponges have holes or pores in which they filter food from the water.</p> <p>no.3 difference between protozoa and porifera</p> | |
| 2613. |
1. Balance the chemical equation: |
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| 2614. |
Which factor decides whether the animal is 'cold blooded' or 'warm blooded ? |
| Answer» <p>On the basis of temperature, warm blooded and cold blooded animal differ..</p><p>The temperature of warm blooded animal depends on normal temperature. Eg- mammals, birds etc..</p><p>The temperature of cold blooded animal depends on surrounding temperature. If surrounding temperature is cold, temperature of organisms also be cold. If surrounding temperature is hot, temperature of organisms also be hot. Eg- polar animals...</p> | |
| 2615. |
2. Deduce Kepler's law of planetary motion and deduce them from the law of0, 2016Gravitation. |
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| 2616. |
33-15he set Z of integers givenShow that the relation R in ta-b) in an equivalence relation.by R- (a, b):2 divides12) |
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| 2617. |
Drive the msic Semiconducto |
| Answer» <p>An intrinsic semiconductor is a pure semiconductor, i.e., a sample without any impurity. </p><p>At absolute zero it is essentially an insulator, though with a much smaller band gap. </p><p>However, at any finite temperature there are some charge carriers are thermally excited, contributing to conductivity.</p> | |
| 2618. |
. Find relation between Tesla and Gau |
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| 2619. |
Show on a graph, the variation of resistivity with temperature for a typical semiconducto |
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| 2620. |
. What is soil erosion? Write the measuresto prevent soil erosion. |
| Answer» <p>Soil erosionis defined as the wearing away of topsoil. Topsoil is the top layer ofsoiland is the most fertile because it contains the most organic, nutrient-rich materials. One of the main causes ofsoil erosionis watererosion, which is thelossof topsoil due to water.</p><p>The 3 main principles tocontrol erosionare to:</p><p>use land according to its capability.</p><p>protect thesoilsurface with some form of cover.</p><p>controlrunoff before it develops into an erosive force.</p> <p>thank</p> | |
| 2621. |
A pendulum bob of mass 50 g 1s suspended from theceiling of an elevator. Find the tension inthe string ithe elevator (a) goes up with acceleration 1:2 m/s(b) goes up with deceleration 1.2 m/s 2 (c) goes up withform velocity, (d) goes down with acceleration1:2 m/s , (e) goes down with deceleration 1.2 m/s and(f) goes down with uniform velocity.ing nlaced on |
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| 2622. |
how many parts does our full body have |
| Answer» <p>It is hard to answer because I don't know what exactly are you asking for. There are over206bones in our body, but they are compoded from 300 different pieces. Every piece has many parts.</p> | |
| 2623. |
how does phototropism occur in plants |
| Answer» <p>Phototropismis the growth of an organism which responds to a light stimulus. </p><p>It is most often observed in plants, but can alsooccurin other organisms such as fungi.</p><p> The cells on theplantthat are farthest from the light have a chemical called auxin that reacts whenphototropism occurs.</p> | |
| 2624. |
How does phototropism occur in plants? |
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| 2625. |
Describe the benefits of transgenic animals. |
| Answer» <p>The benefits of these animals to human welfare can be grouped into areas:</p><p>AgricultureMedicineIndustryThe examples below are not intended to be complete but only to provide a sampling of the benefits.</p><p>1. Agricultural Applications</p><p>Transgenesis will allow larger herds with specific traits.a) breeding Farmers have always used selective breeding to produce animals that exhibit desired traits (e.g., increased milk production, high growth rate).11,15,17 Traditional breeding is a time-consuming, difficult task. When technology using molecular biology was developed, it became possible to develop traits in animals in a shorter time and with more precision. In addition, it offers the farmer an easy way to increase yields.</p><p>Scientists can improve the size of livestock genetically.b) quality Transgenic cows exist that produce more milk or milk with less lactose or cholesterol12, pigs and cattle that have more meat on them8,17, and sheep that grow more wool18. In the past, farmers used growth hormones to spur the development of animals but this technique was problematic, especially since residue of the hormones remained in the animal product.</p><p>Disease-resistant livestock is not a reality just yet.c) disease resistance Scientists are attempting to produce disease-resistant animals, such as influenza-resistant pigs, but a very limited number of genes are currently known to be responsible for resistance to diseases in farm animals.</p><p>2. Medical Applications</p><p>Transplant organs may soon come from transgenic animals.a) xenotransplantation Patients die every year for lack of a replacement heart, liver, or kidney. For example, about 5,000 organs are needed each year in the United Kingdom alone. Transgenic pigs may provide the transplant organs needed to alleviate the shortfall.9 Currently, xenotransplantation is hampered by a pig protein that can cause donor rejection but research is underway to remove the pig protein and replace it with a human protein.</p><p>3. Industrial Applications</p><p>In 2001, two scientists at Nexia Biotechnologies in Canada spliced spider genes into the cells of lactating goats. The goats began to manufacture silk along with their milk and secrete tiny silk strands from their body by the bucketful. By extracting polymer strands from the milk and weaving them into thread, the scientists can create a light, tough, flexible material that could be used in such applications as military uniforms, medical microsutures, and tennis racket strings.</p><p>Toxicity-sensitive transgenic animals have been produced for chemical safety testing. Microorganisms have been engineered to produce a wide variety of proteins, which in turn can produce enzymes that can speed up industrial chemical reactions</p> | |
| 2626. |
6. How does phototropism occur in plants? |
| Answer» <p>through stomata in plants</p> <p>Phototropismis the growth of an organism which responds to a light stimulus. It is most often observed inplants, but can also occurin other organisms such as fungi. The cells on theplantthat are farthest from the light have a chemical called auxin that reacts whenphototropism occurs.</p> | |
| 2627. |
how auxin work in plants |
| Answer» <p>Auxinspromote stem elongation, inhibit growth of lateral buds (maintains apical dominance).</p><p>Auxin is aplanthormone produced in the stem tip that promotes cell elongation.</p><p>Auxinmoves to the darker side of the plant, causing the cells there to grow larger than corresponding cells on the lighter side of theplant.</p> | |
| 2628. |
Write the effects of cyclones |
| Answer» <p>The maineffectsof tropicalcyclonesinclude heavy rain, strong wind, large storm surges near landfall, and tornadoes.</p> | |
| 2629. |
12. What differences Mendel identified between parent and F2generation.(ASI) |
| Answer» <p>Inheritance involves the passing of discrete units of inheritance, or genes, fromparentsto offspring.Mendel foundthat paired pea traits were either dominant or recessive. ... An F1 cross-bred pea plant is a heterozygote – it has 2 different alleles.</p> | |
| 2630. |
SECTIOQ.1. Name the respiratory pigment in human Qbeings, where is this pigment present. |
| Answer» <p>Hemoglobin or Haemoglobin is the respiratory pigment in human beings. It carries dissolved oxygen and thus is very important for human survival. It is red in color and present in the human blood.</p> | |
| 2631. |
19. What is meant by stored program? Who developed? |
| Answer» <p>Astored-programcomputer is a computer that storesprograminstructions in electronic memory. ... Often thedefinitionis extended with the requirement that the treatment ofprogramsand data in memory be interchangeable or uniform.</p> | |
| 2632. |
At what position should a point source of lightbe placed in front of a concave mirror to obtainparallel beam of light? Draw a diagram to support 2your answer. Name a device where this propertyis used. |
| Answer» <p>Whenapoint light sourceisplacedat the focus ofconcave mirrorthen it alllightrays after reflection throughmirror willbecome parallel to the principal axis.</p> | |
| 2633. |
define parallel beam of light |
| Answer» <p> when a large number of rays travel parallel to each other, then we call such collection of rays as parallel beam of light Rays.</p> <p>its not right</p> | |
| 2634. |
Vi8bile phonenswer the following.What were some of the ways used earlier by humans to communicate with others?at is the connection between drawing and human writing?2.Wh |
| Answer» <p>Human communication can be done through numerous ways like talking, using phones, tv, radio, newspapers. </p> | |
| 2635. |
15 Desczibe an adtivitu tachosothat thesconductor |
| Answer» <p>Best activity to show that thermoplastic is a poor conductor of electricity=# coating on electrical wires# screwdriver use by electrician</p> <p>take a battery 🔋, small 💡 and wire and thermosetting plastic connect them all in electric circuit then if the bulb not glow it will be poor conductor of electricity </p> | |
| 2636. |
volution should not be Equated with Progress |
| Answer» <p>Evolution cannot be equated with progress.1.Evolution is not exactly taking place from lower organisms to higher organisms but it can be related to the fact that higher and complex body forms evolved even when the low and simple forms are still existing2.These variations are carried on to successive generations by natural selection.3.If these genetic variations get accumulated over a period of time, alter the individuals of the subgroup and later give rise to new species.</p> | |
| 2637. |
e) Write the characteristics of an OP- AMP |
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| 2638. |
3. Multiply and reduce to lowest form and convert into a mixed fraction:(w) x*W xm 2xw sÄ…20x (w 13xfx1 8x |
| Answer» <p>1.21/52.4/33.12/74.10/9</p> | |
| 2639. |
6. The small pores present on the leaves throughwhich carbon dioxide enters the leaf are called |
| Answer» <p>Carbon dioxidecannot passthroughthe protective waxy layer covering theleaf(cuticle), but it canentertheleaf througha stoma (plural: stomata), flanked by two guard cells. Likewise, oxygen produced during photosynthesis can only pass out of theleaf throughthe opened stomata.</p> <p>The small pores present on the leaves through which carbon dioxide enters the leaf are called stomata</p> | |
| 2640. |
1.Mention the advantages of selecting pea plant for experiment by Mendel |
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| 2641. |
Paheli wants to know themaximum length ofcontinuous silk thread thatcan be obtained from a cocoon |
| Answer» <p>900 metres is the maximum length</p> <p>the length of obtained cocoon will be 900meter</p> <p>900 meter is the maximum length</p> <p>900 metre is the right answer</p> <p>900 meters is the maximum length.</p><p>Please like my answer and then I will also like your answer.</p> <p>900 metres is the maximum length.900 metres is the correct answer.</p> <p>900 meets is the maximum length</p> <p>the length of continuous silk thread can be 900 m</p> | |
| 2642. |
Different types of habitats with definition examples diagram and characteristics. |
| Answer» <p>A habitat is a place where an animal or plant lives. There are several habitats where different animals adapt best. There are many different habitats around the world. Each animal has different needs that can only be provided for them in certain habitats.(i) Forests</p><p>Forests are fascinating ecosystems. The defining feature of a forest is its dense growth of trees. Forests grow where there is enough water available to fulfil trees' needs. The extent of forest growth also depends on temperature ranges, soil nutrients, adequate growing season and altitude.</p><p>(ii) Grasslands</p><p>Grasslands are characterized as areas where grasses are the predominant vegetation and the subsoil is dry with seasonal moisture in the upper soil layers. Their evolution was shaped by periodic fires and the presence of grazing animals. These conditions resulted in the establishment of vast areas of grassland on all of the continents except Antarctica. Today, a quarter of the earth's land surface remains covered by this rapidly vanishing ecosystem.</p><p>All grasslands share several common traits. In general, the term grassland refers to land which:</p><p>is dominated by grasses;occurs on flat or rolling terrain;has similar soils (alkaline, lots of organic matter, very fertile, and fine-grained);has soil that is almost completely covered by vegetation;commonly has fires and high winds (which lead to high evaporation rates and the spread of fires);is characterized by periods of rain followed by periods of drought.</p><p>(iii) DesertsAs different from one another as deserts of the world are, desert habitat they all share one characteristic: they are very dry. Scientists define deserts as areas that get less than 10 inches of rainfall a year and have a very high rate of evaporation. If the annual evaporation rate of an area is higher than the annual amount of rainfall, the area is considered a desert. Evaporation rates are high because deserts tend to have very little cloud cover and strong winds.</p><p>Another characteristic of deserts is sporadic rainfall. If the limited rainfall in deserts fell a little at a time throughout the year, many deserts probably would not look much like deserts. Instead, they'd have a lot more vegetation. Rain doesn't fall evenly throughout the year in a desert, though. It usually comes in big bursts. In some deserts, none at all may fall for more than a year. And then a huge thunderstorm may dump over 5 inches all at once!</p><p>Deserts have some of the most variable temperatures of any places on earth. Because the desert skies are nearly cloudless, the temperatures during the day may sizzle. But without cloud cover to hold in the heat, it radiates into the atmosphere very quickly once the sun goes down. In some deserts, the temperature may drop as much as 77 degrees Fahrenheit in 12 hours.</p><p>(iv) Wetlands</p><p>Wetlands are areas where water is present at least part of the year, generally for at least a portion of the plant-growing season. In addition, wetland soils differ considerably from nearby or surrounding uplands. Hydric soils, found in wetlands, are wet, low in oxygen, and often black with muck. Finally, wetlands support plants — called hydrophytes — that are adapted to living in wet, oxygen-poor soils. Together, these water, soil and vegetation characteristics make up a broad definition for wetlands.</p><p>Though all wetlands contain water at least periodically, the volume of water and the amount of time a wetland is "wet" varies greatly. They also vary in size, from wading-pool sized vernal pools to thousands of acres along coastlines or rivers.</p><p>Wetlands are found all over North America, along coastlines, far inland, in rural areas, and even in the middle of well-populated urban areas. There are generally five kinds of areas where we find wetlands:1) rivers;2) near coasts and inland lakes; 3) in depressions where land is low compared to surrounding landscapes; 4) areas where groundwater seeps out of the ground, and; 5) in broad, flat areas that receive significant rainfall (such as the Everglades).</p><p>(v) Arctic Tundra</p><p>The arctic tundra is circumpolar, meaning that it is an ecosystem surrounding the polar region, above roughly 60 degrees north latitude. The Arctic circle occurs at 66 degrees north latitude.</p><p>In the tundra, short days for much of the year and a harsh cold climate result in a brief growing season of 50-60 days. By contrast, the growing season in temperate forests is about six months long and in tropical forests lasts the entire year.</p><p>Strong winter winds challenge the stability of any plants that grow more than an inch or two above the ground surface. Below a thin layer of soil that thaws every summer is ground that remains frozen year-round, called permafrost. The permafrost may be very deep, reaching more than 1000 feet thick in some locations. Although the tundra receives less than ten inches of precipitation each year (which is why it is sometimes referred to as an arctic desert), there can be plenty of standing water when the upper layer of soil thaws each summer.</p><p>Due to its high latitude and the tilt of the earth, the Arctic experiences light and temperature extremes throughout the calendar year. The plants and animals of the tundra must be adapted to face these challenges, including not only extremes of day length and temperatures, but also harsh winter winds, long periods of below-freezing temperatures, and permanently frozen ground.</p> <p>thank you</p> | |
| 2643. |
4.Why do we need water? |
| Answer» <p>Every human needs water to survive. The human body makes use of water in all cells, organs, and tissues. This water helps regulate body temperature and also helps maintain bodily functions. Water is important for keeping body tissues moist.</p> | |
| 2644. |
Lime stone is a form ofrock. |
| Answer» <p>sedimentary rock ok bhai</p> | |
| 2645. |
If you tie a scale with your arm, are you able to bend your elbow? |
| Answer» <p>No, we cannot bend our elbow.</p> | |
| 2646. |
rele the odd one awandBive a reason for your choice.orWater, wind, sunlight, petroleumStream, lake, river, sea△Buon»Evaporation, infiltration, condensation, precipitationBoiling, lime scale, addition of washing soda, usingLeaking tap, recharge pit,borewell, stepwell시) |
| Answer» <p>1. petroleum, others are natural source.2. sea, others are fresh water sources.3. infiltration4. boiling , it is not a reaction.5. leaking tap. others are water storage methods. </p> <p>Thanks</p> | |
| 2647. |
(iv) ethyne) Which compound is formed when slaked lime reactswith chlorine(G) Caustic soda(ili) Bleaching powder(ii) Sodium carbonate(iv) Baking powder |
| Answer» <p>Slaked lime reacts with chlorine to give (iii) bleaching powder.</p> | |
| 2648. |
the odd one and give a reason for your-lechoice,wind, sunlight, petroleum2 Stream, lake, rtion, infiltration, condensation, precipitationcao. lime scale, addition of washing soda, using ion exchangBoiling,Leaking tap, recharge pit, borewell, stepwell |
| Answer» <p>1)petroleum because all other are natural sources of energy.2) sea because water from all other sources can be used for drinking purpose.3) infiltration because all are other process are part of water cycle.4) using ion exchange beause all other are the process of softening the hard water.5) leaking tap because all the are ground water resources.</p> | |
| 2649. |
Improve your learingWho discovered the cell for the first time? What procedure did he follow |
| Answer» <p>The cell was first discovered by Robert Hooke in 1665 using a microscope. The first cell theory is credited to the work of Theodor Schwann and Matthias Jakob Schleiden in the 1830s</p> | |
| 2650. |
Who discovered first cell and when |
| Answer» <p>The cell was first discovered byRobert Hookein 1665.</p> | |