Multiple choice

The _________ remains close to the growing tip of the pollen tube and eventually disintegrates.

  1. generative nucleus

  2. tube nucleus

  3. zygote

  4. embryo

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The tube nucleus remains at the growing tip of the pollen tube as it elongates toward the ovule and eventually disintegrates. The generative nucleus divides to form two sperm cells. The tube nucleus helps guide pollen tube growth but is not involved in fertilization.