Multiple choice

Which of the following is not an example of a short day plant?

  1. Chrysanthemum

  2. Xanthium

  3. Sugarcane

  4. Lettuce

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

Photoperiodism is the ability of plants to measure day length. Lettuce is a long day plant, which flowers after a critical day length is exceeded. Long day plants flower only when photoperiod (day length) is long, that is, summer.