FSC Biology Book MCQs Chapter 10 Class 12





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Biology Ch 10 Class 12 Evolution

1 / 71

Evolutionary relationships amongst species are reflected in their:

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2 / 71

In the Hardy – Weinberg principle, p2 + 2pq + q2 = 1 . q2 represents the frequency of the:

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3 / 71

Modification in the organization of the basic pentadactyl limb structure found in vertebrates provides good evidence for the principle of:

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Consider the following statements about biological communities.

I. Their members share a common gene pool

II. The community remains stable even though some physical aspect of the environment may undergo a change

III. It consists of all the populations living in a particular area.

IV. A community interacts with a non-living environment and both function together to form an ecosystem

Which two of the above statements are true?

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5 / 71

If allele frequency for a dominant allele is 0.4. What will be the number of heterogeneous individuals if the population is of 100 individuals with diploid traits.

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Adaptations that an organism acquires by its own actions are

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Many scientists believe that one of the following is evolutionary origin(s) of animals, plants and fungi?

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8 / 71

Homology means

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9 / 71

The ultimate source of all changes is:

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10 / 71

Which one is NOT a continuous trait?

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11 / 71

The genetic change in a population caused by natural selection is called?

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12 / 71

Which one of the following pairs represents an analogous feature?

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13 / 71

Genetic equilibrium is a:

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14 / 71

Whose theory of natural selection is essentially identical to Darwin’s theory?

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15 / 71

Who developed a theory of natural selection essentially identical to Darwin’s

16 / 71

The process that has transformed life on earth from its earliest forms to vast diversity is

17 / 71

Lamarck is best known for his theory of:

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18 / 71

Most fossils are found in the

19 / 71

Which of the following scientists contributed a lot to “modern synthetic theory of organic evolution:

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20 / 71

What was the source of hydrogen for first photosynthetic organisms?

21 / 71

Carolus Linnaeus was believer of which of the following?

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22 / 71

Analogous organs show

23 / 71

Natural selection can amplify or diminish variations that are?

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24 / 71

At what point are two populations descending from the same ancestral stock considered separate species?

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25 / 71

This theory says that “mitochondria and chloroplasts are, in effect, ancient bacteria which now live inside the larger cells”:

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26 / 71

Neo-Darwinism has integrated discoveries and ideas from

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Key point to Lamarck’s view about organic evolution is that every offspring

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28 / 71

The total aggregate of genes in a population at any one time is called population’s

29 / 71

During aristotle time, it was thought that

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30 / 71

In the Hardy – Weinberg principle,p2 + 2pq + q2= ?

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31 / 71

Who developed a theory of natural selection essentially identical to Darwin’s?

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32 / 71

The wings of birds and the forelegs of a horse are _____ structures.

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33 / 71

Consider the following statements about biological communities.

I. Their members share a common gene pool

II. The community remains stable even though some physical aspect of the environment may undergo a change

III. It consists of all the populations living in a particular area.

IV. A community interacts with a non-living environment and both function together to form an ecosystem

Which two of the above statements are true?

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34 / 71

Which scientist does not match his achievements

35 / 71

Which animals support Darwin’s view of inheritance of desirable variations?

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36 / 71

On Galapagos island, among the birds, ____ caught much attention of Darwin in formulating his work, related to adaptations.

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37 / 71

According to the theory of natural selection, organisms produce:

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38 / 71

Which of the following is not an evidence for evolution?

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39 / 71

According to the Hardy-Weinberg theorem, what will be the frequency of heterozygote when ‘p’ is 0.2?

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40 / 71

Prokaryotes are considered to be evolved

41 / 71

The organs which are similar in function but differ in structure are called:

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42 / 71

Flagella might have arisen through the ingestion of

43 / 71

Change in frequency of alleles that occurs by chance Is called as:

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44 / 71

A group of interbreeding individuals belonging to a particular species and sharing a common geopraphic area is called?

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45 / 71

Most of the fossils are found in which of the following?

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46 / 71

Which of the following concepts is attributed to Lamarck?

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47 / 71

Which of the following theories or evolution can best explain the vestigial organs.

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48 / 71

Which condition can be explained by Lamarckism?

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49 / 71

The following observations refer to evolution:

Inherited variations which are favored in a particular environment are passed on
There is a struggle for existence
Across time, inherited variations may accumulate causing gradual changes in the organism
Although populations tend to overproduce, they remain more or less constant in numbers from generation to generation
In what sequence should the statement be placed to support the Darwin theory of evolution?

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50 / 71

The following observations refer to evolution:

I. Inherited variations which are ‘favoured’ in particular environments are passed on.

II. There is a struggle for existence.

III. In time, ‘favoured’ inherited variations may accumulate causing gradual changes in the organism.

IV. Although populations tend to overproduce, they remain more or less constant in numbers from generation to generation.

In what sequence should the statements be placed to support Darwin’s theory of evolution?

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51 / 71

Adaptation of traits to better fill a niche is known as which of the following?

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52 / 71

Theory of Lamarck was based on:

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53 / 71

A group of interbreeding individuals belonging to a particular species and sharing a common geopraphic area is called

54 / 71

Mating with non-relatives is known as?

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55 / 71

There existed two varieties of female freshwater Mollusks in which some were streamlined and some had a high bulge. Over the generations, male freshwater Mollusks learned that high bulge favors more production of offspring. So they started preferring to mate with females having high bulge as compared to streamlined. Will this affect Hardy Weinberg Equilibrium in the population?

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56 / 71

What is in q2 Hardy Weinberg equilibrium?

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57 / 71

Choose the correct combination:

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58 / 71

Which of the following is a vestigial organ?

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59 / 71

Natural selection can amplify or diminish variations that are

60 / 71

Inheritance of acquired characteristics is based on:

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61 / 71

Which factor decides what type of variation should be flourished and passed on to the next generations?

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62 / 71

Which statement is incorrect?

63 / 71

Analogous organs show:

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64 / 71

The actual remains or traces of organisms that lived in ancident geological times

65 / 71

______ occurs because natural selection gives some alleles a better chance of survival than others:

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66 / 71

Important point/s of Lamarck’s theory

67 / 71

In humans gill pouches have modified into

68 / 71

Carolus Linnaeus was believer of

69 / 71

Archaebacteria can survive at

70 / 71

A group of populations that have the potential to interbreed in nature is

71 / 71

The process that has transformed life on earth from its earliest forms to vast diversity is?

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