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InterviewSolution
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.
| 1151. |
Branching descent and natural selection are the two key concepts of Darwinian Theory of Evolution. Explain each concept with the help of a suitable example. |
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Answer» Branching descent : Different species descending from the common ancestor - get adapted in different habitats. e.g. Darwin finches - varieties of finches arose from grain eaters / Australian marsupials - evolved from common marsupial. Natural selection : A process in which heritable variations enable better survival of a species to reproduce in large number. e.g. White moth surviving before the industrial revolution and black moth surviving after industrial revolution / Long necked giraffe survived./ DDT resistant mosquito survive. |
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| 1152. |
`(p_q)^(2)+2pq+q^(2)=1` represents an equation used inA. Population geneticsB. Mendelian geneticsC. BiometricsD. Molecular genetics |
| Answer» Correct Answer - a | |
| 1153. |
`(p_q)^(2)+2pq+q^(2)=1` represents an equation used inA. population geneticsB. Mendelian geneticsC. biomertircksD. molecular genetics |
| Answer» Correct Answer - A | |
| 1154. |
How did Darwin explain adaptive radiation ? Give another example of animals exhibiting adaptive radiation. |
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Answer» The process of evolution of various species in certain geographical area beginning from a point & spreading or radiating to other geographical areas or habitats is remains as adaptive radiation. One of the best example of this phenomenon is that of Darwin's Finches. Darwin observed many varieties of finches on the same island all of which have evolved on the island itself from original seed eating features. This has lead to many other forms with altered beaks, enabling them to become insectivorous and vegetarian finches, this process of evolution of different species in a given geographical area, starting from a point, and literally radiating to, other areas of geography is called adaptive radiation. Another example = Australian Marsupials. |
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| 1155. |
Which of the following animals show adaptive radiation based on locomotion?A. Scorpion, elephant, humanB. Cheetah,kangaroo,moleC. Praying mantis, seal,pythonD. Cockroach, squirrel, toad |
| Answer» Correct Answer - D | |
| 1156. |
Adaptive radiation refers toA. Power of adaptation in an individual to a variety of environmentsB. Adaptations due to Geographical isolationC. Evolution of different species from a common ancestorD. Migration of members of a species to different gengraphical areas. |
| Answer» Correct Answer - C | |
| 1157. |
Replica plating experiment was conducted byA. Joshua LederbergB. R.A.FisherC. Esther LederbergD. (1) and (3) |
| Answer» Correct Answer - D | |
| 1158. |
State the evolutionary relationship giving reasons between the thorn of Bougainvillea and tendril of cucurbit. |
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Answer» Divergent evolution/Homologous organs. Similar in origin but perform different function. Detailed Answer: The thorn of Bougainvillea and tendril of cucurbits are homologous structures as both are similar in structure and origin but have different functions. Both of them arise from the axil of leaf and have anatomical similarity. Thorn provide protection and tendril gives support. Divergent evolutionary relationship has brought such similarity between them. |
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| 1159. |
An evolutionary process giving rise to new species adapted to new habitats and ways of life is calledA. adaptationB. microevolutionC. adaptive radiationD. convergent evolution |
| Answer» Correct Answer - C | |
| 1160. |
Parallelism isA. adaptive divergence in evolutionB. adaptive convergence of widely different species in evolutionC. adaptive convergence of closely related species in evolutionD. none of the above |
| Answer» Correct Answer - C | |
| 1161. |
Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift, mutation, genetic recombination andA. saltationB. evolutionC. limiting factorsD. over production |
| Answer» Correct Answer - D | |
| 1162. |
Hardy-Weinberg equilibrium is known to be affected by gene flow, genetic drift, mutation, genetic recombination andA. evolutionB. limiting factorsC. saltationD. natural selection |
| Answer» Correct Answer - D | |
| 1163. |
Industrial melanism was highlighted byA. Mimosa pudicaB. Triticum aestivumC. Biston betulariaD. Rock python |
| Answer» Correct Answer - C | |
| 1164. |
Replacement of the lighter-coloured variety of peppered moth (Biston betularia) to its darker variety (Biston carbonaria) in England is the example ofA. natural selectionB. regenerationC. genetic isolationD. temporal isolation. |
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Answer» Correct Answer - A In England before industrialisation in 1860, it was observed that there were more white-winged moths on tree trunks than dark winged or melanised moths. But after industrilisation in 1920, there were more dark-winged moths in the same area, Before industrialisation, the tree trunks were covered nu white-winged moths survived but the dark winged moths were eaten by predators. During post industrialisation period. the tree trunnks became dark due to industrial smoke and soot. Therefore, the white winged moths could not survive due to predators but dark winged moths survived. i.e., the moths that were hidden in background survived. Thus. industrial melansim supports evolution by natural selection. |
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| 1165. |
Which is not a vestigial organ in man?A. Nictitating membraneB. Tail vertebraeC. Vermiform appendixD. Nails |
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Answer» Correct Answer - D Vestigial organs are those organs which are present in reduced form and do not perform any function in the body but correspond to the fully developed functional organs of related animals. These organs are believed to be reminants of organs which were complete and functional in the ancestors. in man, nails are not vestigial organs. |
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| 1166. |
The phenomenon of “ Industrial Melanism” demonstrates __________ (a) Natural selection (b) induced mutation(c) reproductive isolation (d) geographical isolation |
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Answer» (a) Natural selection |
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| 1167. |
Phenomenon of industrial melanism demonstratesA. Geographical isolationB. Reproductive isolationC. Natural selectionD. Induced mutation |
| Answer» Correct Answer - C | |
| 1168. |
Phenomenon of industrial melanism demonstratesA. geographical isolationB. reproductive isolationC. natural selectionD. induced mutation. |
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Answer» Correct Answer - C Refer to answer 41. |
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| 1169. |
Fossils of Peking man were found from caves near peking in china by Davidson Black. He named themA. Homo erectus pekinensisB. Sinathropus pekinensisC. Homo erectusD. Homo erectus erectus |
| Answer» Correct Answer - B | |
| 1170. |
Postanal tail can be traced inA. CobraB. EarthwormC. ScorpionD. Centripede |
| Answer» Correct Answer - A | |
| 1171. |
Which of these pairs is vestigial ?A. Coccyx and pinna musclesB. Coccyx and premolarC. Facial hair in ladiesD. Coccyx and intercostal muscles |
| Answer» Correct Answer - A | |
| 1172. |
There is not life on moon because there is noA. WaterB. OxygenC. NitrogenD. Hydrogen |
| Answer» Correct Answer - A | |
| 1173. |
According to abiogeneis , life originated fromA. NonlivingB. OtherplanetsC. PreexistingD. Spontaneously |
| Answer» Correct Answer - A | |
| 1174. |
Common origin of man and chimpanzee is best shown byA. banding pattern in chromosomes number 3 and 6B. cranial capacityC. binocular visionD. dental formula |
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Answer» Correct Answer - A A comparative study of the banding of chromosomes of man and the great apes has shown that the total amount of DNA in human diploid cells and that of apes is more or less similar. The banding pattern of human chromosome numbers 3 and 6 are compared with those of particular autosomes in the chimpanzee, which shows a common origin. More over, blood protein test also proves that man is most closely related to great apes (chimpanzee and gorilla). |
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| 1175. |
Common origin of man and chimpanzee is best shown byA. Dental formulaB. Cranial capacityC. Binocular visionD. Chromosome number |
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Answer» Correct Answer - D The chromosomes of man and chimpanzees are quite similar. The number of chromosomes in chimpanzee is is 48 and in man is 46, which becomes reduce due to fusion of 2 chormosomes. |
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| 1176. |
Magnolias, Tulips and Sassafras Plants are found inA. NepalB. CanadaC. AustriaD. USA and China |
| Answer» Correct Answer - B | |
| 1177. |
Common origin of man and chimpanzee is best shown byA. Cranial capacityB. Binocular visionC. ChromosomesD. Dental formula |
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Answer» Correct Answer - C Common origin of man and chimpanzee is best shown by chromosomes. |
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| 1178. |
Basic principles of embryonic development were stated byA. von BaerB. HaeckelC. DarwinD. Weismann |
| Answer» Correct Answer - D | |
| 1179. |
Rule of embryonic development was given byA. Van BearB. HaeckelC. MendelD. Darwin |
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Answer» Correct Answer - A Rule of embryonic development was given by Van Bear. |
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| 1180. |
Name three main kinds of rocks |
| Answer» Correct Answer - Igneous , sedimentary , metamorphic | |
| 1181. |
Mention one temporary embryonic structure of no use |
| Answer» Correct Answer - Teeth in bird embryo | |
| 1182. |
Neanderthal man differs from modern man inA. Receding jawsB. Protruding jawsC. Could make good toolsD. Could make good pictures |
| Answer» Correct Answer - B | |
| 1183. |
How does Neanderthal man differ from the modern man in appearance? |
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Answer» Neanderthal man differ from the modem human in having semierect posture, flat cranium, sloping forehead, thin large orbits, heavy brow ridges, protruding jaws and no chin. |
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| 1184. |
Mention any three similarities found common in Neanderthal man and Homo sapiens. Common characters showed by Neanderthal man and Homo sapiens are: |
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Answer» 1. Usage of Fire 2. Burying of deadbodies 3. Protecting themselves from predators |
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| 1185. |
Which of the following fact is not true for Homo habills?A. They had a brain capacity of 1400ccB. They were the first human-like beingC. They showed the hominid featuresD. They probably did not eat meat. |
| Answer» Correct Answer - C | |
| 1186. |
Which of the following was discovered in Ethiopia and Tanzania?A. Fossils of dinosaursB. Few fossils of man-like bonesC. Alive coelacanthD. Fossils of Archaeopteryx |
| Answer» Correct Answer - A | |
| 1187. |
In the primaeval Earth, the organic molecules accumulated in ___ becaue their ____ was extremely slow in the absence of any life or enzymatic catalysis. |
| Answer» Correct Answer - water , decomposition | |
| 1188. |
The closest relative of modern man is considered to beA. ChimpanzeeB. OrangutanC. ApesD. Gibbon |
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Answer» Correct Answer - A The closest relative of modern man is considered to be chimpanzee on the basis of : (i) Similar banding pattern in `3^(rd)` and `6^(th)` chromosome. (ii) Similar blood groups (ABO) (iii) Similar blood proteins. |
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| 1189. |
Which of the following is closest relative of man?A. ChimpanzeeB. GorillaC. OrangutanD. Gibbon |
| Answer» Correct Answer - A | |
| 1190. |
One of the important consequences of geographical isolation isA. Random creation of new speciesB. No change in the isolation faunaxC. Preventing speciationD. `Speciation through reproductive isolation. |
| Answer» Correct Answer - D | |
| 1191. |
One of the important consequences of geographical isolation isA. preventing speciationB. speciation through reproductive isolationC. random creation of new speciesD. no change in the isolated fauna |
| Answer» Correct Answer - B | |
| 1192. |
One of the important consequences of geographical isolation isA. no change in the isolated faunaB. preventing speciationC. speciation through reproductive isolationD. random creation of new species |
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Answer» Correct Answer - C Speciation is the formation of new species and the development of species diversity occurs when gene flow within the common pool is interrupted by an isolating mechanism. The isolation can occur through geographical separation of population, known as allopatric speciation. |
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| 1193. |
Peking man was slightly shorter, little lighter and weaker thanA. SivapithecusB. RamapithecusC. KenyapithecusD. Java man |
| Answer» Correct Answer - D | |
| 1194. |
Among the human ancestors the brain size was more than 1000 cc in:A. Homo neanderthalensisB. Homo erectusC. RamapithecusD. Homo habilis |
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Answer» Correct Answer - A The cranial capacity of Homo neanderthalensis was about 1450 cc, roughly to that of modern man. |
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| 1195. |
Among the human ancestors the brain size was more than 1000 cc in:A. Homo erectusB. RamapithecusC. Homo habilisD. Homo neandrthalensis |
| Answer» Correct Answer - D | |
| 1196. |
Among the human ancestors the brain size was more than 1000 cc in:A. Homo erectusB. RamapithecusC. Homo habilisD. Homo neanderthalensis |
| Answer» Correct Answer - D | |
| 1197. |
Explain the interpretation of Charles Darwin when he observed a variety of small black birds on Galapagos Islands. |
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Answer» In Galapagos Islands, the small black birds amazed Darwin and he later called them finches. He realised that there were many varieties of finches in the same island. All the varieties evolved on the island itself. This process of evolution was called adaptive radiation, According to Darwin this evolution was based on available resources, food and space. There is survival of the fittest. |
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| 1198. |
How do we compute the age of a fossil? |
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Answer» By radiocarbon dating. |
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| 1199. |
How will you compute the age of fossil? |
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Answer» The age of fossils can be determined using two methods namely, relative dating and absolute dating. Relative dating is used to determine a fossil by comparing it to similar rocks and fossils of known age. Absolute dating is used to determine the precise age of a fossil by using radiometric dating to measure the decay of isotopes. |
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| 1200. |
How do we compute the age of a living tree? |
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Answer» Age of the living tree is calculated by counting the number of annual rings or by the radioactive carbon dating, |
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