Multiple choice

Which of the following plants keeps its stomata open during the night and closed during the day?

  1. Water lily

  2. Maize plant

  3. Cactus

  4. Cucurbita

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

In cactus, stomata close at night to reduce water loss. They lose water when it is open so they open in the day when CO2 is at its best.