Question

Entry of pollen tube through the end opposite to micropyle is

• A. Porogamy
• B. Chalazogamy
• C. Mesogamy
• D. Syngamy

Answer 1

The correct option is B Chalazogamy

Pollen tube eventually reaches the 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 in most of the angiosperms.

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

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

Since, the end opposite to micropyle is chalaza, entry of pollen tube through this end will be from chalaza i.e. this will be Chalazogamy. So, the correct answer is B.