Question

 C₄-plants are more eflicient in  photosynthesis than C_3-plants due to

(a) Higher leaf area 

(b) Presence of larger number of chloroplasts in the leaf cells 

(c) Presence of thin cuticle 

(d) Lower rate of photorespiration

Answer 1

Correct option (b) Presence of larger number of chloroplasts in the leaf cells

Explanation :

C_4-plants are more efficient in photosynthesis than C₃ -plants but use more energy. They possess the larger number of chloroplasts in the leaf cells. In the leaves of C₄ -plants, the vascular bundles are surrounded by bundle sheath cells which in turn are surrounded by mesophyll cells. Chloroplast in bundle sheath cells are larger and always contain grana, whereas chloroplasts in mesophyll cells are smaller.