Question

Pollen tube usually enters the embryo sac through

• A. One of the synergids
• B. Directly penetrates the egg
• C. Between one synergid and central cell
• D. By knocking of antipodal cells

Answer 1

Answer: (A)

One of the synergids

A pollen tube is part of the male gametophyte of seed plants. It acts as a conduit to transport the male gamete cells from the pollen grain, either from the stigma (in flowering plants) to the ovules at the base of the pistil, or directly through ovule tissue in some gymnosperms. In maize, this single cell can grow longer than 12 inches to traverse the length of the pistil.
Pollen tubes were first discovered by Giovanni Battista Amici. Pollen tube usually enters the embryo sac through one of the synergids.

Thus, the correct answer is option A.