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 absorbs moisture and germinates to produce a pollen tube that grows down the style to deliver sperm cells to the ovule. The zygote forms later after fertilization, embryo sac is within the ovule, and ovary is the fruit precursor.