Question

Germ pore/ germinal furrow present on the surface of pollen grain represents

• A. Area where exine is thin or absent
• B. Specialised thickening of exine
• C. Specialised thickening of intine
• D. Area where tectum is absent

Answer 1

The correct option is A Area where exine is thin or absent

Pollen wall consists of two layers: outer layer exine and inner layer intine.

Exine is made up of sporopollenin which is one of the most resistant known biological materials. Exine is thin in the beginning but it becomes very thick with maturity. However, exine is discontinuous or ruptured at some places. These are the called the germ pores (or germinal furrow) through which pollen tube comes out during germination on the stigma.

So, the correct answer is A.