Class 12th Biology – 7 Evolution MCQs

Accidental fluctuations in alleles of a population are termed as ____.

Correct! Wrong!

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Accidental fluctuations in alleles of a population are termed as genetic drift.

The most important factor needed for speciation is ____.

Correct! Wrong!

The most important factor needed for speciation is Reproductive isolation. This prevents breeding with members of other species and hence helps in speciation.

Banded anteater and Wombat found in Australia are ____.

Correct! Wrong!

Banded anteater and Wombat found in Australia are both marsupials, as they are pouched organisms which nourish their young ones in pouches.

Homoerectus is biological name of

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Homoerectus is biological name of Peking and Java man.

The atmosphere of primitive earth consisted of ____.

Correct! Wrong!

The atmosphere of primitive earth consisted of water, ammonia, methane and hydrogen. Ozone and oxygen were gasses which were added up later.

Any change in the development of tail during the course of evolution in man is useless.

Correct! Wrong!

Any change in the development of tail during the course of evolution in man is useless.

The testes of man and the ovaries of woman are examples of ____.

Correct! Wrong!

The testes of man and the ovaries of woman are examples of homologous organs. Homologous organs are organs with similar anatomical structure but have different functions.

The character which proves that frogs have evolved from fishes is ____.

Correct! Wrong!

The character which proves that frogs have evolved from fishes are the presence of gills in the tadpole and the fish.

Dinosaurs became extinct in

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Cretaceous period of mesozoic era was the time of extinction of giant reptiles like dinosaurs.

Analogous organs have

Correct! Wrong!

Analogous organs carry out the same function, but have different basic structure and different origin.

The source of energy for Miller’s experiment was ____.

Correct! Wrong!

The source of energy for Miller’s experiment was Electric discharge.

The existence of marsupials in Australia and New Zealand proves ____.

Correct! Wrong!

The existence of marsupials in Australia and New Zealand prove continental drift.

Which of the following primate is the closest relative of humans?

Correct! Wrong!

Chimpanzees and gorillas are our closest relatives among the living primates.

The homologous organs are those that show similarity in

Correct! Wrong!

Homologous organs have same basic structure and origin but they differ in their external appearance and functions.

First Hominids were ____.

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First Hominids were Ramapithecus.

Galapagos Islands are associated with the work of ____.

Correct! Wrong!

Darwin’s theory is based on his work on Finches on Galapagos Islands.

The first ancestor of man whose fossils have been discovered was

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The first ancestor of man whose fossils have been discovered was Australopithecus

Darwin in his 'Natural Selection Theory' did not believe which one of the following in organic evolution?

Correct! Wrong!

In any population, there is always competition for space and food resources.

Adaptation is a type of

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Adaptation is a type of convergent evolution where distantly related groups adapt for the same function.

One of the important consequences of geographical isolation is

Correct! Wrong!

Speciation takes place via reproductive isolation which is the most important consequence of geographical isolation.

Which one of the following features is closely related with the evolution of humans?

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Loss of a prehensile tail is associated with with the gradual development of errect posture and bipedal gait.

The era which corresponds to the period when life had not originated upon the earth is ____.

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The era which corresponds to the period when life had not originated upon the earth is Azoic.

From the view point of evolutionary success, mutation should occur in ____.

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From the view point of evolutionary success, mutation should occur in germplasm DNA. Mutations which occur in Somatic DNA cannot be inherited and hence it cannot be of evolutionary significance.

In Homo habilis "habilis" refer to

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Habilis refer to tool maker discovered in east africa. It had bipedal locomotion, moved erect and was omnivorous.

____ is a set of homologous organs.

Correct! Wrong!

Pectoral fins of a fish and forelimbs of a horse is a set of homologous organs. Homologous organs are organs with similar anatomical structure but have different functions. The rest are examples of analogous organs as they have different anatomical structure but have same functions.

Cranial capacity of cro-magnon man was

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Cranial capacity of cro-magnon man was 1600 cc.

Darwin’s finches are one of the best examples of ____.

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Darwin’s finches are one of the best examples of adaptive radiation.

Which one of the following statement is correct?

Correct! Wrong!

Ontogeny repeats phylogeny.

According to Charles Darwin, evolution is ____.

Correct! Wrong!

According to Charles Darwin, evolution is descent with modification.

Class 12th Biology - 7 Evolution MCQs
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