Evolution Test

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Evolution Test - 68

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Weekly Quiz Competition

Question 1
1 / -0

Read the given statements (i)-(iv) regarding evolution and select the incorrect ones.
(i) The oceanic water rich in mixture of organic compounds was termed by J.B.S. Haldane $$(1920)$$ as 'hot dilute soap of organic substances'.
(ii) The term coacervate was given by Syndey Fox.
(iii) First cellular form of life appeared approximately $$2000\ mya$$ on earth.
(iv) The first geological time scale was developed by Georges Cuvier.

A
(ii) and (iv)

B
(i) and (ii)

C
(ii) and (iii)

D
(iii) and (iv)
Question 2
1 / -0

The 'Devonian period' is considered to be as

A
Age of fishes

B
Age of amphibians

C
Age of reptiles

D
Age of mammals

Solution

Devonian period occurred about $$400$$ million years ago in Palaeozoic era. This period was marked by abundance of fishes and hence called as age of fishes.
So, the correct answer is 'Age of fishes'.
Question 3
1 / -0

Consider the following three statements and select the correct option stating which one is true (T) and which one is false (F).
(i) The skull of baby chimpanzee is more like adult human skull than adult chimpanzee skull.
(ii) The first mammals were like shrews.
(iii) The work of Thomas Malthus on populations influenced Lamarck.

A
(i) - T, (ii) - F, (iii) - T

B
(i) - F, (ii) - T, (iii) - T

C
(i) - T, (ii) - T, (iii) - F

D
(i) - F, (ii) - T, (iii) - F

Solution

Palaeozoic era is the era of ancient life. The correct arrangement of periods of this era is $$Cambrian \rightarrow Ordovician$$ (age of invertebrates) $$\rightarrow Silurian \rightarrow Devonian$$ (Age of fishes) $$\rightarrow Carboniferous$$ (age of Amphibians) $$\rightarrow Permian$$.
Question 4
1 / -0

Given below are four statement (i) - (iv) regarding geological time scale. Read them carefully.
(i) Palaeozoic era is the era of ancient life.
(ii) Ordovician period is the age of vertebrates.
(iii) Carboniferous period is the age of reptiles
(iv) Proterozoic era is the era of early life.
Which of the above two statements are incorrect?

A
(i) and (iv)

B
(ii) and (iii)

C
(ii) and (iv)

D
(i) and (iii)
Question 5
1 / -0

Amphibians were dominant during ________ period.

A
Carboniferous

B
Silurian

C
Ordovician

D
Cambrian

Solution

Carboniferous period of palaeozoic era is known as the age of amphibians. It existed about $$350$$ billions years ago in which reptiles and winged insects originated and amphibians were dominant.
So, the correct answer is 'Carboniferous'.
Question 6
1 / -0

The most accepted line of descent in human evolution is

A
$$Australopithecus \rightarrow Ramapithecus \rightarrow Homo\ sapiens \rightarrow Homo\ habilis$$

B
$$Homo\ erectus \rightarrow Homo\ habilis \rightarrow Homo\ sapiens$$

C
$$Ramapithecus \rightarrow Homo\ habilis \rightarrow Homo\ erectus \rightarrow Homo\ sapiens$$

D
$$Australopithecus \rightarrow Ramapithecus \rightarrow Homo\ erectus \rightarrow Homo\ habilis \rightarrow Homo sapiens

Solution

Ramapithecus appeared about 14-15 million years ago.
Homo habilis appeared about 2 million years ago.
Homo erectus appeared about 1.5 million years ago.
modern man appears about 10,000 years ago.
So, the correct option is 'Ramapithecus $$\rightarrow$$ Homo habilis $$\rightarrow$$ Homo erectus $$\rightarrow$$ Homo sapiens.
Question 7
1 / -0

Who proposed that the first form of life could have come from pre-existing non-living organic molecule?

A
S. L. Miller

B
Oparin and Haldane

C
Alfred Wallace

D
Hugo de Vries

Solution

The theory of biogenesis was proposed by Oparin and Haldane. It states that life could have come from pre-existing non-living organic molecules (e.g. RNA, protein, etc.) and that formation of life was preceded by chemical evolution, i.e. formation of diverse organic molecules from inorganic constituents.
So the correct option is 'Oparin and Haldane'.
Question 8
1 / -0

Which one of the following correctly describes the homologous structures?

A
Organs with anatomical similarities, but performing different functions.

B
Organs with anatomical dissimilarities, but performing same function

C
Organs that have no function now, but had an important function in ancestors.

D
Organs appearing only in embryonic stages and disappearing later in the adult.

Solution

Homologous organs are those that develop from the same structure along different directions due to adaptations to different needs and shows common ancestry. For example whales, bats, cheetah and human share similarities in the pattern of bone and forelimbs.
So the correct option is 'Organs with anatomical similarities, but performing different functions.'.
Question 9
1 / -0

$$(p + q)^{2} = p^{2} + 2pq + q^{2} = 1$$ represents an equation used in

A
Population genetics

B
Mendelian genetics

C
Biometrics

D
Molecular genetics

Solution

Hardy-Weinberg principle describes a theoretical situation in which a population is undergoing no evolutionary changes. According to Hardy-Weinberg principle, the balance in the relative numbers of alleles that is maintained within a large population over a period of time assuming that : (i) mating is random (2) there is no natural selection (3) there is no migration (4) there is no mutation. In such a stable population, for a gene with two alleles $$A$$ (dominant) and a (recessive). If the frequency of $$A$$ is $$p$$ and $$a$$ is $$q$$, then the frequencies of the three possible genotypes ($$AA, Aa$$ and $$aa$$) can be expressed by the Hardy-Weinberg equation; $$p^{2} +2pq + q^{2} = 1$$.
So, the correct answer is 'Population genetics'.
Question 10
1 / -0

In a population with two alleles for a gene locus (P and p), the allele frequency of P is 0.7. What would be the frequency of heterozygotes if the population is in Hardy-Weinberg equilibrium?

A
0.49

B
0.42

C
0.21

D
0.09

Solution

Frequency of allele P = 0.7 or 70%, Frequency of allele p = 0.3 or 30%.
From Hardy-Weinberg equilibrium : (p^2 + 2pq + q^2)
2pq (Heterozygous genotype) = 2 x 0.7 x 0.3 = 0.42 or 42%
So, the correct answer is '0.42'.

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Evolution Test - 68

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Evolution Test - 68

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Question 1

(ii) and (iv)

(i) and (ii)

(ii) and (iii)

(iii) and (iv)

Question 2

Age of fishes

Age of amphibians

Age of reptiles

Age of mammals

Solution

Question 3

(i) - T, (ii) - F, (iii) - T

(i) - F, (ii) - T, (iii) - T

(i) - T, (ii) - T, (iii) - F

(i) - F, (ii) - T, (iii) - F

Solution

Question 4

(i) and (iv)

(ii) and (iii)

(ii) and (iv)

(i) and (iii)

Question 5

Carboniferous

Silurian

Ordovician

Cambrian

Solution

Question 6

$$Australopithecus \rightarrow Ramapithecus \rightarrow Homo\ sapiens \rightarrow Homo\ habilis$$

$$Homo\ erectus \rightarrow Homo\ habilis \rightarrow Homo\ sapiens$$

$$Ramapithecus \rightarrow Homo\ habilis \rightarrow Homo\ erectus \rightarrow Homo\ sapiens$$

$$Australopithecus \rightarrow Ramapithecus \rightarrow Homo\ erectus \rightarrow Homo\ habilis \rightarrow Homo sapiens

Solution

Question 7

S. L. Miller

Oparin and Haldane

Alfred Wallace

Hugo de Vries

Solution

Question 8

Organs with anatomical similarities, but performing different functions.

Organs with anatomical dissimilarities, but performing same function

Organs that have no function now, but had an important function in ancestors.

Organs appearing only in embryonic stages and disappearing later in the adult.

Solution

Question 9

Population genetics

Mendelian genetics

Biometrics

Molecular genetics

Solution

Question 10

0.49

0.42

0.21

0.09

Solution

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