Question

Pollen tube is covered by ___________.

• A. Exine only
• B. Plasmalemma only
• C. Intine only
• D. Exine and intine

Answer 1

The correct option is C Intine only

Pollen tube emerge out from the germ pore. Exine is very thin at the site of germ pores. The pollen grain gets hydrated at the time of germination. There occurs swelling in the outer pectic layer of intine that leads to rupture of Exine. Thus, its intine that comes out in the form of pollen tube.

Hence, pollen tube is covered by Intine.

So, the correct answer is C.