Evolution Test

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Evolution Test - 6

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Question 1
1 / -0

Which among the following statements is TRUE regarding human blood?

A
This system is unique to our species.

B
It is a common practise around the world for people to use blood types as criteria for selecting their spouse.

C
Each individual can be categorised on the basis of a number of different blood typing systems.

D
There are only two major blood group systems; the ABO and Rh systems.

Solution

The International Society of Blood Transfusion (ISBT) identifies about 30 major blood group systems, including the ABO and Rh systems.
Question 2
1 / -0

Which of the following is a vestigial organ in humans?

A
Vermiform appendix

B
Cervical vertebra

C
Atlas

D
None of these

Solution

Vermiform appendix is a vestigial organ in humans. In plant-eating vertebrates, the appendix is much larger and its main function is to help digest a largely herbivorous diet. The human appendix is a small pouch attached to the large intestine where it joins the small intestine and does not directly assist digestion.So,biologists believe the human appendix is a vestigial organ left behind from a plant-eating ancestor.
Question 3
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The isolated pockets of red-haired people in the British Isles is an example of discontinuous distribution. This distribution pattern is most likely the consequence of

A
voyaging of red-haired people

B
natural selection favouring red hair

C
random mating

D
random variation

Solution

This distribution pattern is most likely the result of migration of groups of red-haired people into areas where other hair colours pre-dominated. However, it could also result from discriminatory marriage partner selection.
Question 4
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The augmenting frequency of yellow-brown hair among Australian aborigines, as one moves inland from the southwest coast of Australia, is an example of

A
random variation

B
progressive gradation

C
discontinuous distribution

D
natural selection

Solution

The gradual, more or less continuous change in hair colour from one group of aborigines to another is not random or haphazard. There probably is a progressive gradation because there are different evolutionary pressures from one region to another.
Question 5
1 / -0

The following question has four choices, out of which ONLY ONE is correct.
What happens to the tyrosinase gene during melanin synthesis in skin of an albino?

A
An epistatic effect over other genes, so that melanin is not formed

B
A complementary role, so that melanin formation is affected

C
Supplementary role, so that melanin is formed and hidden

D
Modifying role, so that melanin formation is stopped

Solution

The system of genes that determines skin colour in man, for example, is independent of the gene responsible for albinism (lack of pigment) or the development of skin colour. This gene is an epistatic gene. When the albino condition occurs, the genes that determine skin colour are present but not expressed
Question 6
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Forelimbs of frog, lizard, bird and man have some evolutionary relationship. These are

A
vestigial organs

B
missing links

C
analogous organs

D
homologous organs

Solution

The basic structure of the limbs is similar though it has been modified to perform different functions in various vertebrates. Hence these are homologous organs.
Question 7
1 / -0

The process of origination of life on Earth was experimentally shown by

A
Urey and Miller

B
Oparin and Haldane

C
Watson and Crick

D
None of these

Solution

The Miller–Urey experiment (or Miller experiment) was a chemical experiment that simulated the conditions thought at the time to be present on the early Earth, and tested the chemical origin of life under those conditions. It supported the hypothesis that putative conditions on the primitive Earth favoured chemical reactions that synthesized more complex organic compounds from simpler inorganic precursors.
Question 8
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The wings of an insect and a bird are examples of

A
analogous organs

B
vestigial organs

C
homologous organs

D
analytic organs

Solution

The wings of an insect and a bird are examples of analogous organs as they have different structures, but perform same function.
Question 9
1 / -0

A random change in the frequency of alleles in any population over several generations due to errors in the gametes is called

A
gene flow

B
genetic drift

C
genetic error

D
genetic abnormality

Solution

A random change in the frequency of alleles in any population over several generations due to errors in the gametes is called genetic drift. A population's allele frequency is the fraction of the copies of one gene that share a particular form. Genetic drift may cause gene variants to disappear completely and thereby reduce genetic variation. It can also cause initially rare alleles to become much more frequent and even fixed.
Gene flow (also known as gene migration) is the transfer of alleles or genes from one population to another.
Genetic error is an error in a single gene due to mutation or an inability to give proper instructions to make cells.
Genetic abnormality is a disease or disorder that is inherited genetically.
Question 10
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Surgically removing tails of mice over several generations do not yield mice without tails. What does it prove?

A
Surgically removing tails of mice over several generations do not yield mice without tails. What does it prove?

B
Cutting tail does not cause genetic change; so it is not inherited.

C
Acquired characters during one's own life are not inherited.

D
Both (1) and (2) are correct.

Solution

Cutting tail does not cause genetic change; so it is not inherited. Acquired characters during one's own life are not inherited.

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Evolution Test - 6

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Evolution Test - 6

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SHARING IS CARING

Question 1

This system is unique to our species.

It is a common practise around the world for people to use blood types as criteria for selecting their spouse.

Each individual can be categorised on the basis of a number of different blood typing systems.

There are only two major blood group systems; the ABO and Rh systems.

Solution

Question 2

Vermiform appendix

Cervical vertebra

Atlas

None of these

Solution

Question 3

voyaging of red-haired people

natural selection favouring red hair

random mating

random variation

Solution

Question 4

random variation

progressive gradation

discontinuous distribution

natural selection

Solution

Question 5

An epistatic effect over other genes, so that melanin is not formed

A complementary role, so that melanin formation is affected

Supplementary role, so that melanin is formed and hidden

Modifying role, so that melanin formation is stopped

Solution

Question 6

vestigial organs

missing links

analogous organs

homologous organs

Solution

Question 7

Urey and Miller

Oparin and Haldane

Watson and Crick

None of these

Solution

Question 8

analogous organs

vestigial organs

homologous organs

analytic organs

Solution

Question 9

gene flow

genetic drift

genetic error

genetic abnormality

Solution

Question 10

Surgically removing tails of mice over several generations do not yield mice without tails. What does it prove?

Cutting tail does not cause genetic change; so it is not inherited.

Acquired characters during one's own life are not inherited.

Both (1) and (2) are correct.

Solution

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