Evolution — Page 7 | NEET Biology

Q61

One of the important consequences of geographical isolation is

A preventing speciation

B speciation through reproductive isolation

C random creation of new species

D no change in the isolated fauna.

Correct Answer

Option B

Solution

(b) Speciation through reproductive isolation is the most important consequence of geographical isolation.

Q62

Adaptive radiation refers to

A evolution of different species from a common ancestor

B migration of members of a species to different geographical areas

C power of adaptation in an individual to a variety of environments

D adaptations due to geographical isolation.

Correct Answer

Option A

Solution

(a) Adaptive radiation is evolution of different species from a common ancestor (divergent evolution).

Q63

What is common to whale, seal and shark?

A Thick subcutaneous fat

B Convergent evolution

C Homoiothermy

D Seasonal migration

Correct Answer

Option B

Solution

(b) Whale, seal and shark show convergent evolution due to similar aquatic habitats.

Q64

What is common between parrot, platypus and kangaroo?

A Toothless jaws

B Functional post-end tail

C Ovoparity

D Homeothermy

Correct Answer

Option D

Solution

(d) Only birds and mammals are homeothermous (warm-blooded).

Q65

The concept of chemical evolution is based on

A interaction of water, air and clay under intense heat

B effect of solar radiation on chemicals

C possible origin of life by combination of chemicals under suitable environmental conditions

D crystallization of chemicals.

Correct Answer

Option C

Solution

(c) Chemical evolution: origin of life by combination of chemicals under suitable environmental conditions.

Q66

Which one of the following pairs of items correctly belongs to the category of organs mentioned against it?

A Thorn of Bougainvillea and tendril of Cucurbita - Analogous organs

B Nictitating membrane and blind spot in human eye - Vestigial organs

C Nephridia of earthworm and malpighian tubules of Cockroach - Excretory organs

D Wings of honey bee and wings of crow Homologous organs

Correct Answer

Option C

Solution

(c) Nephridia (earthworm) and Malpighian tubules (cockroach) are both excretory organs.

Q67

Thorn of Bougainvillea and tendril of cucurbita are examples of

A analogous organs

B homologous organs

C vestigial organs

D retrogressive evolution

Correct Answer

Option B

Solution

(b) Both are modified stems — homologous organs with common origin but different functions.

Q68

Darwinism finches are an excellent example of

A adaptive radiation

B seasonal migration

C brood parasitism

D connecting links

Correct Answer

Option A

Solution

(a) Darwin's Finches are an excellent example of adaptive radiation.

Q69

Which one of the following scientists name is correctly matched with the theory put forth by him?

A Weismann - Theory of continuity of germplasm

B Pasteur - Inheritance of acquired characters

C De Vries - Natural selection

D Mendel Theory of Pangenesis

Correct Answer

Option A

Solution

(a) Weismann proposed the theory of continuity of the germplasm.

Q70

Peripatus is a connecting link between:

A Mollusca and Echinodermata

B Annelida and Arthropoda

C Coelenterata and Porifera

D Ctenophora and Platyhelminthes

Correct Answer

Option B

Solution

(b) Peripatus (Onychophora) is a connecting link between Annelida and Arthropoda.