Question

Each pollen tube has ______.

विकल्प

• one generative nucleus and one tube nucleus

• one generative nucleus and two tube nuclei

• two generative nuclei and one tube nucleus

• two generative nuclei and two tube nuclei

Answer 1

Each pollen tube has two generative nuclei and one tube nucleus.

Explanation:

A mature pollen tube typically carries two male gametes formed when the generative nucleus divides, and one tube (vegetative) nucleus. The tube nucleus eventually degenerates.