Origin of Life, Natural Selection and Speciation - Evolution - Life Sciences Previous Year Questions

1

2007 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2007

The evolutionary history of an organism is called

A

Taxonomy

B

Dendrogram

C

Phylogeny

D

Cladogram

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2

2007 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2007

Which of the following statement is not included in the inductions and deductions of Darwinism ?

A

The prodigality or reproduction is very important since over crowdedness results in struggle for existence

B

In the struggle for existence the organisms with variation in structure habits or instincts may be better adapted to new conditions and will have better chance of survival

C

Natural selection operates amongst the fittest and the new forms are established leading to speciation.

D

There is no organism without genotype. The genotype should be changed to give an efficient organism.

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3

2007 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2007

One of the most remarkable features of evolution is the formation of the amnion and the allantoin, which appeared for the first time in

A

Amphibians

B

Fishes

C

Birds

D

Reptiles

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4

2009 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2009

Homology in anatomical parts helps in determining evolutionary kinship because

A

Homologous body parts invariably perform similar functions

B

Display evolutionary adaptations

C

Undergo similar genetic changes

D

Have common embryological origin

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5

2009 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2009

Which of the following does NOT explain the term “survival of the fittest” ?

A

Fittest animals leave higher number of progeny than those which perish.

B

Fittest group of animals out populates its competitors.

C

Fittest animals are best predators.

D

Fittest group is rich in genetic variations.

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6

2009 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2009

In a coral island in Atlantic Ocean, a natural calamity killed most of its population. The island is repopulated with the surviving individuals and their progeny. The present day population in the island shows high incidence of a rare recessive genetic disorder. What could be the most probable evolutionary force responsible for this phenomenon ?

A

Geographical isolation

B

Genetic drift

C

Selective advantage of the recessive disorder

D

Natural selection

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7

2010 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2010

Which one of the following is the smallest biological unit capable of evolving over time?

A

A cell

B

An individual organism

C

A population

D

A species

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8

2010 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2010

In allopatric mode of speciation, a new species forms due to

A

Geographic isolation

B

Genetic drift

C

Formation of a few fertile individuals that can not mate with other members of the same species living in the same geographical area

D

The formation of allopolyploid condition

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9

2012 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2012

An estimate of phylogenetic relationships among the taxa is commonly represented in the form of a

A

Cladogram

B

Idiogram

C

Phenogram

D

Dendrogram

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10

2012 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2012

Match the following evolutionary biologists with their respective theory I) August Weisman i) Neutral theory of molecular evolution II) Jean-Baptiste Lamark ii) Handicap principle III) Amotz Zahavi iii) Germ plasm theory IV) Motoo Kimura iv) Inheritance of acquired characteristics

A

I-ii, II-iv, III-i, IV-iii

B

I-iii, II-iv, III-ii, IV-i

C

I-iii, II-iv, III-i, IV-ii

D

I-ii, II-iii, III-iv, IV-i

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11

2013 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2013

Which one of the following provides the strongest support for the theory of “descent with modification”?

A

Early embryonic forms of diverse organisms (examples: fishes, birds and mammals) appear similar

B

Ability of fishes and whales to swim

C

Variation in flower colour in a given species

D

Skin colour variation among individuals in a human population

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12

2013 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2013

Which one of the following is an example of sympatric speciation?

A

Origin of new species among wasps that pollinate figs

B

Emergence of a new species among finches that migrated to an island and thus isolated from their ancestors

C

Evolution of birds’ and bats’ wings

D

Speciation of squirrels separated by a wide river

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13

2013 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2013

Among the following options, choose the one that is probably a cause of rapid diversification of animal groups during the Cambrian explosion.

A

Adaptation of organisms to live in the salty environment of ocean

B

Emergence of coelom

C

The movement of animals to land

D

The accumulation of sufficient atmospheric oxygen to support the metabolism of actively moving animals

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14

2016 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2016

Which of the following is a neutral phenomenon?

A

Natural selection

B

Sexual selection

C

Genetic drift

D

Population bottleneck

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15

2016 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2016

A population of Bees develops resistance to pesticides and the trait gets fixed within a few generations. This is an example of

A

macroevolution.

B

disruptive selection.

C

stabilizing selection.

D

microevolution.

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16

2017 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2017

One of the most remarkable features of evolution is the formation of amnion and allantoin. This appeared for the “first time” in evolutionary time scale in

A

reptiles

B

birds

C

fishes

D

humans

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17

2018 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2018

Increase in the existent population of grey peppered moth, Biston betularia, during industrial revolution in Britain is an example of which ONE of the following evolutionary processes?

A

Neutral selection

B

Disruptive selection

C

Directional selection

D

Stabilizing selection

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18

2018 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2018

Which ONE of the following statements is NOT part of the classical Darwinian theory of evolution by natural selection?

A

A trait which is constantly used will get inherited by next generation.

B

Phenotypic variations exist among the individuals of a population of a species

C

Individuals that best fit into a given environment are more likely to survive

D

Each population can randomly acquire a distinct and separate suite of variations.

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19

2019 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2019

The finches on the Galapagos Islands have widely differing beaks adapted according to their diets. This is an example of

A

Adaptive radiation

B

Parallel evolution

C

Adaptive convergence

D

Co-adaptation

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20

2019 · Life Sciences · Evolution · Origin of Life, Natural Selection and Speciation

Life Sciences (XL) 2019

Which one of the following factors does NOT contribute to “allopatric speciation”?

A

The isolated population is exposed to different selection pressure as compared to parent population

B

A population become geographically isolated from the parent population

C

There is a gene flow between the two separated populations

D

Genetic drift occurs between the two separated populations

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