Evolution Questions — NEET Biology

Q1

In a species, weight of newborn ranges from 2 to 5 kg. 97% with 3 to 3.3 kg survive whereas 99% born with 2-2.5 or 4.5-5 kg die. Which type of selection is this?

A Directional selection

B Stabilising selection

C Disruptive selection

D Cyclical selection

Correct Answer

Option B

Solution

(b) Stabilising selection favors intermediate trait values and eliminates extremes.

Q2

Golden era/age of reptiles is

A palaeozoic

B mesozoic

C recent

D proterozoic

Correct Answer

Option B

Solution

(b) Jurassic period of Mesozoic era is known as the Age of Reptiles.

Q3

Which was absent in the atmosphere at the time of origin of life?

A NH3

B H2

C O2

D CH4

Correct Answer

Option C

Solution

(c) O2 was absent in the primitive reducing atmosphere; it appeared after photosynthesis evolved.

Q4

Which of the following represents the order of Horse?

A Perissodactyla

B Caballus

C Ferus

D Equidae

Correct Answer

Option A

Solution

(a) Horse classification: Order - Perissodactyla, Family - Equidae, Genus - Equus, Species - ferus.

Q5

Homo sapiens evolved during which epoch?

A Pleistocene

B Oligocene

C Pliocene

D Miocene

Correct Answer

Option C

Solution

(c) Pliocene is characterized by the origin of humans.

Q6

Occurrence of endemic species in South America and Australia is due to

A These species have been extinct from other regions

B Continental separation

C There is no terrestrial route to these places

D Retrogressive evolution

Correct Answer

Option B

Solution

(b) Continental separation caused geographical isolation, leading to endemic species.

Q7

According to Hugo de Vries, the mechanism of evolution is

A Multiple step mutations

B Saltation

C Minor mutations

D Phenotypic variations

Correct Answer

Option B

Solution

(b) Hugo de Vries believed evolution is by saltation (single step large mutation).

Q8

Similarities in organisms with different genotype indicates

A Microevolution

B Macroevolution

C Convergent evolution

D Divergent evolution

Correct Answer

Option C

Solution

(c) Different genotype but similar phenotype (function) indicates convergent evolution.

Q9

Some bacteria are able to grow in Streptomycin containing medium due to

A natural selection

B Induced mutation

C reproductive isolation

D genetic drift

Correct Answer

Option A

Solution

(a) Natural selection allows growth of only streptomycin-resistant bacteria.

Q10

Genetic drift operates only in

A smaller Populations

B larger Populations

C mendelian Populations

D island Populations

Correct Answer

Option A

Solution

(a) Genetic drift effects are more pronounced in smaller populations.