Question

The apical growing region of pollen tube called

• A. Growing zone
• B. Cap block
• C. Non-vacuolate region
• D. Organelle region

Answer 1

Answer: (B)

Cap block

Apical zone of pollen tube contains abundant vesicles but lacks cell organelles. It is hemisphere in shape and transparent in nature. This transparent apical growing region of pollen tube is called as cap block. It exists only until the tube is growing. It disappears as soon as the growth ceases.

Thus, the correct answer is option B.