Biology Practice MCQs Chapter 10 Class 12


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Created on By Ali Durrani

Biology Ch 10 Class 12 Evolution

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

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

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Archaebacteria can survive at

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

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

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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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During aristotle time, it was thought that

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

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

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Neo-Darwinism has integrated discoveries and ideas from

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

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Natural selection can amplify or diminish variations that are

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Evolutionary relationships amongst species are reflected in their:

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Flagella might have arisen through the ingestion of

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

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Inheritance of acquired characteristics is based on:

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Carolus Linnaeus was believer of which of the following?

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Homology means

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

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Genetic equilibrium is a:

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

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Prokaryotes are considered to be evolved

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Analogous organs show

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

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

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

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Mating with non-relatives is known as?

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Carolus Linnaeus was believer of

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Analogous organs show:

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In humans gill pouches have modified into

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

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According to the theory of natural selection, organisms produce:

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Which statement is incorrect?

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Which one is NOT a continuous trait?

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Theory of Lamarck was based on:

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Which of the following is a vestigial organ?

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

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Which of the following is not an evidence for evolution?

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Important point/s of Lamarck’s theory

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Which scientist does not match his achievements

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Lamarck is best known for his theory of:

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

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

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

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

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

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

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

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

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Most fossils are found in the

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What was the source of hydrogen for first photosynthetic organisms?

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

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56 / 71

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

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

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58 / 71

Natural selection can amplify or diminish variations that are?

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59 / 71

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

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60 / 71

What is in q2 Hardy Weinberg equilibrium?

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61 / 71

Which of the following concepts is attributed to Lamarck?

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

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

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64 / 71

Which condition can be explained by Lamarckism?

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Adaptations that an organism acquires by its own actions are

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

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Which one of the following pairs represents an analogous feature?

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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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Choose the correct combination:

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70 / 71

The ultimate source of all changes is:

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71 / 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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