InterviewSolution
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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.
| 1. |
In evolution of horse, two most important anatomical and morphological changes brought about areA. Limbs and tailB. Limbs and heightC. Limbs and teethD. Teeth and tail |
| Answer» Correct Answer - C | |
| 2. |
Archeopteryx a transitional fossil between birds and reptiles was discovered from the rocks of following periodA. JurassicB. Archeozoic eraC. CretaceousD. Triassic |
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Answer» Correct Answer - A Archaeopteryx, intermediate between reptiles and birds, originates towards the close of jurassic period. |
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| 3. |
Assertion: Genetic drift refers to changes in the allele frequency occuring by chance. Reason: Sampling errors often lead to the elimination of certain alleles and fixation of others, reducing genetic variability. |
| Answer» Correct Answer - B | |
| 4. |
Name the specific terms being used for the following statements : (a)The chance elimination of the genes of certain traits when a section of population migrates or dies of natural calamity is referred to as ….. (b)Change in the morphology and number of chromosomes at times is referred to as ... (c )A small group of human beings leave their homes to find a new settlement. This result in the formation of a different genotype in new settlement. It is called ... |
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Answer» (a) Genetic drift (b)Chromosomal aberrations (c )Founder effect |
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| 5. |
The bones of forelimbs of whale, bat, cheetah and man are similar in structure, becauseA. One organism has given rise to anotherB. They share a common ancestorC. They perform the same functionD. They have biochemical similarities |
| Answer» Correct Answer - B | |
| 6. |
How do closely related species of alligators, at present , occur only in South-eastern United States Eastern China ? Explain |
| Answer» Descendants of a common ancestor in some cases inhabit different continents and also differ from each other This is called discontinuous distribution. Common example is of alligators which at present occur only in South-eastern United States and Eastern China. Such a discontinuous distribution can be explained as follows : Bering Strait Region. The climate of the whole region was much warmer than at present , and the alligators (as revealed by fossil evidence ) were distributed over the entire region. In late Cenozoic , the climatic changes, due to ice age, caused extinction of alligators in most of the region. South-eastern United States and Eastern China remained by glaciations and here the alligators survived. The alligators of these regions have been separated for a long time, and have developed different random mutations. As a result , they have become slightly different but closely species of the same genus | |
| 7. |
According to Darwin, diversity as found in Australian marsupials is due toA. Convergent evolutionB. Adaptive radiationC. Parallel rediationD. Parallel evolution |
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Answer» Correct Answer - B According to Darwin, diversity as found in Australian marsupials is due to adaptive radiation. |
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| 8. |
At Australian marsupials evolved in theA. AfricaB. Galapagos islandsC. Australian continentD. North America |
| Answer» Correct Answer - C | |
| 9. |
Chance elimination of the genes of certain traits in the event of migration or death of section of population by natural calamity is called _____ |
| Answer» Correct Answer - Genetic drift | |
| 10. |
Australia has egg-lying and pouched mammals that occur nowhere else. How can it be explained by evolutionists ? |
| Answer» Egg-lying mammals and pouched mammals only occur in Australia. This restricted distribution can be explained as follows : Australia continent separated from the mainland of Asia during the Mesozoic era, before placental mammals evolved. Placental mammals, being more adapted, eliminated the egg laying mammals and majority of pouched mammals in other parts of the world . The primitive mammals of Australia survived as placental mammals could not reach Australia due to lack of land route. These primitive mammals have flourished and along different lines through divergergent evolution in Australia. | |
| 11. |
The existence of marsupials in Australia and New Zealand proveA. Genetic driftB. Geological periodC. Continental driftD. Both (b) and (c) |
| Answer» Correct Answer - D | |
| 12. |
Darwins finches are the classical examples studied for adaptive radation. Explain. |
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Answer» Darwin’s finches are the birds whose common ancestor arrived on the Galapagos about 2 million year ago. During that time, Darwin’s finches have evolved into 14 recognized species differing in body size, beak shape and feeding behavior. Changes in the size and form of the beak have enabled different species to utilize different food resources such as insects, seeds and nectar from cactus flowers and blood from iguanas, all driven by Natural selection. Genetic variation in the ALX1 gene in the DNA of Darwin finches is associated with variation in the beak shape. Mild mutation in the ALX1 gene leads to phenotypic change in the shape of the beak of the Darwin finches. |
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| 13. |
Dark coloured Peppered Moth is able to survive in industrial areas as compared to light coloured form because ofA. High fecundityB. MimicryC. Natural selection in smoky environmentD. Lethal mutation |
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Answer» Correct Answer - C Dark coloured Peppered Moth is able to survive in industrial areas as compared to light coloured form because of natural selection in smoky environment. |
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| 14. |
A: Placental wolf and Tasmanian wolf (a marsupial) show convergent evolution. R: Like marsupials placental mammals in other parts of world also exhibit adaptive radiation in evolving into varieties of such placental mammals each of which appears to be similar to a corresponding marsupial.A. If both Assertion `&` Reason are true and the reason is the correct explanation of the assertion. Then mark (1)B. If both Assertion `&` Reason are true but the reason is not the correct explanation of the assertion, then mark (2)C. If Assertion is true statement but Reason is false, then mark (3)D. If both Assertion and Reason are falses statements, then mark (4) |
| Answer» Correct Answer - A | |
| 15. |
Placental wolf and Tasmanian wolf marsupial exhibitA. Adaptive radiationB. Divergent evolutionC. Convergent evolutionD. Homology |
| Answer» Correct Answer - C | |
| 16. |
Tasmanian wolf is a marsupial while wolf is a placental mammal. This shows `:`A. Convergent evolutionB. Divergent evolutionC. ParallelismD. Inheritance of acquired characters |
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Answer» Correct Answer - A Tasmanian wolf is a marsupial while Wolf is a placental mammal. This shows convergent evolution. |
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| 17. |
Name the placental mammal corresponding to the Austrian “Spotted cuscus” and Tasmanian “tiger cat”. Which have evolved as a result of convergent evolution |
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Answer» Lemur and Bobcat. |
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| 18. |
The endangered largest living lemur idri idri is in inhabitant ofA. MadagascarB. MauritiusC. IndiaD. Sri Lanka |
| Answer» Correct Answer - A | |
| 19. |
Lemur and Spotted cuscus exhibitA. Convergent evolutionB. HomologyC. AnalogyD. Hybridisation. |
| Answer» Correct Answer - A | |
| 20. |
Hardy-Weinberg equilibrium is not affected by which of the following factors?A. Random matingB. Genetic recombination during gametogensisC. Natural selectionD. Variations due to mutation |
| Answer» Correct Answer - A | |
| 21. |
How can Hardy-Weinberg equilibrium be affected ? Explain giving three reasons. |
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Answer» (i)Genetic drift (ii)Mutation and recombination (iii)Gene migration are the three reasons which will affect the Hardy-Weinberg equilibrium |
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| 22. |
What is disturbence in Hardy- Weinberg genetic equilibrium indicaitive of Explain how it is caused. |
| Answer» Correct Answer - It is indicative of variations | |
| 23. |
Which animal has become extinct recently ?A. DinosaurB. PterodactylC. MammothD. Dodo |
| Answer» Correct Answer - D | |
| 24. |
Name two reproductive characters that probably make reptiles more successful than amphibians. |
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Answer» Two reproductive characters that made reptiles more successful than amphibians are : (i) Reptiles lay eggs on land. (ii) Reptiles lay thick shelled egg which do not get dry up in sun shine unlike those of amphibians. |
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| 25. |
Rearrange the following in an ascending order of evolutionary tree reptiles, salmander, lobfins, frogs. |
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Answer» Lobfins, frogs, salamanders and reptile. |
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| 26. |
The ancestors of modern day Frogs and Salamanders areA. IcthyophisB. Jawless fishC. AmphioxusD. Coelocanth |
| Answer» Correct Answer - D | |
| 27. |
a. Rearrange the following in an ascending order of evolutionary tree: reptiles, salamanders, lobefins, frogs. b. Name two reproductive characters that probably make reptiles more successful than amphibians. |
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Answer» a. Lobefins, frogs, salamanders, reptiles b. Reptiles are more successful than amphibians as: i. reptiles lay eggs on land. ii. reptiles lay thick shelled eggs which do not dry up in sun unlike those of amphibians. |
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| 28. |
Discovery of lobefins is considered very significant by evolutionary biologists. Explain. |
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Answer» Lobefins were fish-like animals with stout and strong fins that lived both on water as well as on land. Their discovery is significant as they prove that amphibians have evolved from fish-like organisms. Lobefins are ancestors of modern day frogs and salamanders. |
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| 29. |
Jurassic period of the Mesozoic era is characterised byA. flowering plants and first dinosaurs appearB. gymnosperms and dominant plants and first birds appearC. radiation of reptiles and origin of mammal like reptilesD. dinosaurs become extinct and angiosperms appear |
| Answer» Correct Answer - B | |
| 30. |
Jurassic period of the Mesozoic era is characterised byA. Gymnosperms are dominant plants and first birds apeearB. Radiation of reptiles and origin of mammal life reptilesC. Dinosaurs become extinct and angiosperms appear.D. Flowering plants and first dinosaurs appear. |
| Answer» Correct Answer - A | |
| 31. |
Jurassic period of the Mesozoic era is characterised byA. Dinosaurs become extinct and angiosperms appearB. Flowering plants and fitst dinosaurs appearC. Gymnosperms are dominant plant and first birds appearD. Radiation of reptiles and origin of mammal-like reptiles |
| Answer» Correct Answer - C | |
| 32. |
Jurassic period of the Mesozoic era is characterised byA. gymnosperms are dominant plants and first birds appearB. radiation of reptiles and origin of mammal like reptilesC. dinosaurs become extinct and angiosperms appear appearD. flowering plants and first dinosaurs appear |
| Answer» Correct Answer - A | |
| 33. |
The biologist who has been called the 'Darwin of the `20^(th)` cantury', wasA. LinnaeusB. Ernst MayrC. DienerD. Whittaker |
| Answer» Correct Answer - B | |
| 34. |
The turtle and tortoise evolved fromA. AmphibiansB. FishesC. MammalsD. None of these |
| Answer» Correct Answer - d | |
| 35. |
Maximum survival and reproductive capacity shown by a population under optimal environmental conditions is called:A. carrying capacityB. natalityC. biotic potentialD. vitality |
| Answer» Correct Answer - C | |
| 36. |
Find out from newspapers and popular science articles any new fossil discoveries or controversies about evolution. |
Answer»
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| 37. |
Which of the following is a missing link?A. BalanoglossusB. OmithorhyncusC. Archaeoptaryx.D. More than one option is correct. |
| Answer» Correct Answer - C | |
| 38. |
Name the ancestor of modern amphibian. |
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Answer» The ancestor of modern amphibian is Coelacanth. |
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| 39. |
Assertion:Fossil modern man (also called Cro-Magnon man) is thought to be the direct ancestor of the living man . Reason:The two resemble in all essential features and the change involved the evolution of culture rather than that of morphologyA. If both Assertion and Reason are true and Reason is the correct explanation of AssertionB. If both Assertion and Reason are true and Reason is not the correct explanation of AssertionC. If Assertion is true but Reason is false.D. If both Assertion and Reason are false |
| Answer» Correct Answer - A | |
| 40. |
Which one of the following is direct ancestor of modern manA. AustralopithecusB. RamapithecusC. Homo erectusD. Homo habilis |
| Answer» Correct Answer - C | |
| 41. |
________were present but they all fell to form coal deposits slowly. |
| Answer» Correct Answer - Giant ferns (Pteridophytes) | |
| 42. |
The fish-like giant reptile which existed 200 mya wasA. PteranodonB. LchthyosaurC. TriceratopsD. Tyrannosaurus |
| Answer» Correct Answer - B | |
| 43. |
The primate which existed 15 mya wasA. Homo habilisB. AustralopithecusC. RamapithecusD. Homo erectus |
| Answer» Correct Answer - C | |
| 44. |
Which of the following is the correct sequence of ancestor of the evolution of plant forms. a-chlorophyte, b-psilophyton, c-Rhynia type, f- Tracheophyte |
| Answer» Correct Answer - `a rarr d rarr c rarr b` | |
| 45. |
About 200 mya the dinosaurs suddenly disappeared from the earth. (True/False) |
| Answer» Correct Answer - False (It is 65 mya) | |
| 46. |
Stablising selection favours.A. both extreme forms of a traitB. Intermediate forms of a traitC. enviromental differenceD. one extreme form over the other extreme form and over intermediate forms of a trait. |
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Answer» Correct Answer - B Refer to answer 78. |
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| 47. |
Which was absent in the atmosphere at the time of origin of life ?A. `NH_(3)`B. `H_(2)`C. `O_(2)`D. `CH_(4)` |
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Answer» Correct Answer - C `O_(2)` gas absent in the atmosphere at the time of origin of life. |
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| 48. |
Theory of pangenesis was given byA. DarwinB. LamarckC. Hugo ds VriesD. Oparin |
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Answer» Correct Answer - A Theory of pangenesis was given by Darwin. |
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| 49. |
The first cellular forms of life appeared on earth about________million years ago (mya) |
| Answer» Correct Answer - 2000 | |
| 50. |
Read the following statements and select the correct option. (i) Increase in metained months after industrialisation in Great Britain is a proof for natural selection. (ii) When more individuals of a population acquire a mean character value, it is called disruption. (iii) Changes in allelic frequency in a population will lead to Hardy-Weinberg equilibrium. (iv) Genetic drift changes the existing gene or allelic frequency in future generations.A. Only ii is correct.B. Only iv is correct.C. Both I and iv are correct.D. Both I and ii are correct. |
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Answer» Correct Answer - C When more individuals of a population acquire a mean character value, it is called stabilising selection. No change in allelic frequency in a population will lead to Hardy-Weinberg equilibrium. |
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