Multiple choice

After landing on the stigma, the pollen grain germinates to give rise to

  1. ovary

  2. embryo sac

  3. pollen tube

  4. zygote

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

When a pollen grain lands on a compatible stigma, it germinates and produces a pollen tube that grows down through the style to reach the ovary. The pollen tube delivers sperm cells to the ovule for fertilization. The ovary contains ovules, embryo sac is within the ovule, and zygote forms after fertilization.