Biology MCQ For WBCS Prelims and Mains P3

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138721. The 'Theory of Natural Selection' was proposed by

A

A. I. Oparin

B

C. R. Darwin

C

J. B. S. Haldane

D

G. J. Mendel

B

Correct Answer: B. C. R. Darwin

125522. A plant cell shrinks when placed in

A

A hypertonic solution

B

A hypotonic solution

C

Water

D

A solution is isotonic with the cell sap

A

Correct Answer: A. A hypertonic solution

252023. A person of which blood group can be a universal donor?

A

O

B

A

C

B

D

AB

A

Correct Answer: A. O

143324. The greenhouse effect is caused by the addition of too much of this compound in the atmosphere

A

Water vapor

B

Dust Particles

C

Carbon dioxide

D

Ammonia

C

Correct Answer: C. Carbon dioxide

133425. Majority of animal-viruses contain

A

RNA and DNA

B

RNA

C

DNA

D

None of the above

C

Correct Answer: C. DNA

129426. Which one of the following is a Reptile?

A

Newt

B

Shark

C

Salamander

D

Turtle

D

Correct Answer: D. Turtle

140927. During cell division, DNA synthesis takes place in

A

Prophase

B

Telopliage

C

Interphase

D

Anaphase

C

Correct Answer: C. Interphase

141428. The portion of the carapace which covers the gill of prawn is known as

A

Branchiostegite

B

Branchiostegal spine

C

Bronchus

D

Branchiostegal membrane

D

Correct Answer: D. Branchiostegal membrane

128129. The number of cervical vertebrae in a mammal is

A

Seventy-seven

B

Eleven

C

Seven

D

Seventeen

C

Correct Answer: C. Seven

141130. The total mass of all the organisms of given type and/or in a given area is called

A

Biomarker

B

Biosensor

C

Biome

D

Biomass

D

Correct Answer: D. Biomass

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