PG TRB Botany Study Materials 2020-2021 Free Download - 4

Question: 16

The part of the eye behind the lens is filled with

(A) blood

(B) vitreous humor

(C) acqueous humor

(D) lymph

Question: 17

The most stable eco system is

(A) sea

(B) desert

(C) forest

(D) steppe

Question: 18

Which one among the following is not a good source of nutritional calcium?

(A) Rice

(B) Ragi

(C) Skimmed milk

(D) Egg

Question: 19

Nitrogen fixation is done by

(A) blue green algae

(B) red algae

(C) green algae

(D) brown algae

Question: 20

The role of chlorophyll in photosynthesis is

(A) to absorb sunlight

(B) to absorb water

(C) to absorb CO₂

(D) none of these