Evolution Test

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Evolution Test - 17

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Weekly Quiz Competition

Question 1
1 / -0

The chance of elimination of genes from a small population is an example of

A
Selection pressure

B
Speciation

C
Adaptation

D
Genetic drift

Solution

A small population is not in Hardy Weinberg Equilibrium and may lose alleles due to Genetic Drift.
So, the correct answer is 'genetic drift'
Question 2
1 / -0

The earliest and most primitive anthropoid ape during Oligocene is called

A
Parapithecus

B
Prophopithecus

C
Proconsul

D
Limnopithecus
Solution
- Origin and evolution were about 30-35 million years ago.
- Originated from Egypt
- The oldest and the most primitive is Parapithecus.
So, the correct option is 'Parapithecus'.
Question 3
1 / -0

First cell produced on earth is

A
Protobiont

B
Protozoa

C
Metazoa

D
None of the above

Solution

First cells produced were simple aggregates of organic compounds, called protobionts, which are thought to be precursors of prokaryotes.
Question 4
1 / -0

The dinosaurs were maximum during the period of

A
Jurassic

B
Triassic

C
Cretaceous

D
Palaeocene

Solution

The dominant animals during the Jurassic period were dinosaurs.
So, the correct answer is 'Jurassic'
Question 5
1 / -0

The gene frequency of a population changes ____.

A
In one particular environment

B
When the population decreases

C
When the population live in different conditions

D
When population reproduces asexually

Solution

Genetic variation is the naturally occurring genetic differences among individuals of the same species. This variation permits flexibility and survival of a population in the face of changing environmental circumstances.
Factors affecting the gene frequency of population:
Physical distribution of individuals affects a population.
When a population interbreeds.
Random fluctuations in the numbers of alleles in a population.
Migration is the movement from one location to another.
So the answer is 'When the population live in different conditions'.
Question 6
1 / -0

One of the possible early sources of energy was/ were

A
$$CO_{2}$$

B
Chlorophyll

C
Green plants

D
UV rays and lightning

Solution

Among energy sources used by nature early were UV radiation, intermitant lightning ionising radiation and even thermal energy.
So, the correct answer is 'UV rays and lightning'
Question 7
1 / -0

If the Neanderthals are not the direct ancestors of humans, is it still possible for humans and Neanderthals to be related?

A
Yes, because we share a common ancestor

B
Yes, but only if humans and Neanderthals could have interbred

C
No, because the human evolutionary tree is strictly linear and without branches

D
No, because this means that Neanderthals evolved from an entirely different branch of organisms than humans did

Solution

Neanderthal mans are not the direct ancestors of humans. But obviously we share a common ancestry. Human evolutionary tree consist of branches.
So, the correct answer is 'Yes, because we share a common ancestor'
Question 8
1 / -0

Which one among the following is an example for homology?

A
Eye of octopus and mammals

B
Tuber of sweet potato and potato

C
Flippers of penguins and dolphins

D
Thorns and tendrils of Bougainvillea and Cucurbita

Solution

The animals or plants that evolve same structure along different directions due to adaptations to different needs is known as divergent or homologous evolution and it shows common ancestry. The thorn and tendrils of Bougainvillea and Cucurbita represent homology.
So the correct option is 'Thorns and tendrils of Bougainvillea and Cucurbita'.
Question 9
1 / -0

If the frequency of an autosomal dominant allele is 0.6. Calculate the frequency of recessive phenotype in a population of 6000:-

A
1200

B
4000

C
960

D
1000

Solution

Explanation -

p = 0.6
q = 1 - 0.6 = 0.4
$$q^2 = 0.16$$
then in 6000 individuals
$$\dfrac{16}{100}\times 6000 = 960$$
Question 10
1 / -0

Life originated in

A
Precambrian era

B
Proterozoic era

C
Mesozoic era

D
Cenozoic era
Solution
- Precambrian is one of the four eras in earth's geological history.
- Precambrian actually meant period before the Cambrian period of the Palaeozoic era.
- Precambrian is divided into three periods- Azoic (no life), Archaeozoic (invisible life) and Proterozoic (age of early life).
- It is believed that life appeared in Archeozoic period of Precambrian era.

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Re-Attempt Weekly Quiz Competition

Evolution Test - 17

Result

Evolution Test - 17

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SHARING IS CARING

Question 1

Selection pressure

Speciation

Adaptation

Genetic drift

Solution

Question 2

Parapithecus

Prophopithecus

Proconsul

Limnopithecus

Solution

Question 3

Protobiont

Protozoa

Metazoa

None of the above

Solution

Question 4

Jurassic

Triassic

Cretaceous

Palaeocene

Solution

Question 5

In one particular environment

When the population decreases

When the population live in different conditions

When population reproduces asexually

Solution

Question 6

$$CO_{2}$$

Chlorophyll

Green plants

UV rays and lightning

Solution

Question 7

Yes, because we share a common ancestor

Yes, but only if humans and Neanderthals could have interbred

No, because the human evolutionary tree is strictly linear and without branches

No, because this means that Neanderthals evolved from an entirely different branch of organisms than humans did

Solution

Question 8

Eye of octopus and mammals

Tuber of sweet potato and potato

Flippers of penguins and dolphins

Thorns and tendrils of Bougainvillea and Cucurbita

Solution

Question 9

1200

4000

960

1000

Solution

Question 10

Precambrian era

Proterozoic era

Mesozoic era

Cenozoic era

Solution

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