Question

Route used by pollen tube for entering ovule is

• A. Integument
• B. Micropyle
• C. Chalaza
• D. Any of the above

Answer 1

The correct option is D Any of the above

Pollen tube eventually reaches the embryo sac through micropyle of an ovule and for this purpose, it may follow one of the following three routes:

1. Porogamy- when the pollen tube enters the ovule through micropyle. It is common for most of the angiosperms.

2. Chalazogamy- when the pollen tube enters through the chalazal tissues.

3.Mesogamy- when the pollen tube enters through the integuments or through funiculus.

Hence, pollen tube can enter the ovule through micropyle, integument or chalaza. So, the correct answer is D.