WBCS Practice Sets on General Science (Biology) P17

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161. Monocotyledonous plants show which of the following feature?
(A) Flowers are trimerous
(B) Perennial growth
(C) Leaf shows reticulate venation
(D) Tap root system.

Correct Answer: [A] Flowers are trimerous.

162. 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.

Correct Answer: [D] Biomass.

163. Kranz anatomy states that the plant has
(A) C2 cycle
(B) C3 cycle
(C) C4 cycle
(D) Both C3 and C4 cycle.

Correct Answer: [C] C4 cycle.

164. Name one rootless plant.
(A) Monochoria
(B) Pistia
(C) Ceratophyllum
(D) Eichhornia.

Correct Answer: [B] Pistia.

165. The portion of the carapace which covers the gill of prawn is known as
(A) Branchiostegite
(B) Branchiostegal spine
(C) Bronchus
(D) Branchiostegal membrane.

Correct Answer: [D] Branchiostegal membrane.

166. An example of the modified underground stem is
(A) Groundnut
(B) Turnip
(C) Carrot
(D) Potato.

Correct Answer: [D] Potato.

167. Necton is
(A) animals associated with aquatic plants.
(B) submerged plants in the water.
(C) floating organisms in the water.
(D) swimming organisms in the water.

Correct Answer: [D] swimming organisms in the water.

168. Which one of the following is a rich source of amylase?
(A) Thyroid
(B) Pancreas
(C) Brain
(D) Blood.

Correct Answer: [B] Pancreas.

169. Phenotypic ratio of Mendelian Dihybrid cross is
(A) 3 : 4 : 3 : 1
(B) 1 :2 : 1 :1
(C) 9 : 3 : 3 : 1
(D) 1 : 1 : 1 : 1

Correct Answer: [C] 9 : 3 : 3 : 1.

170. "Natural Selection" is the theory from
(A) T. H. Morgan
(B) None of the above
(C) G. J. Mendel.
(D) Charles Darwin.

Correct Answer: [D] Charles Darwin.

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