Stomata opening in the morning even in constant light shows

  1. a response to ABA
  2. a daily (circadian) rhythm
  3. wilting
  4. plasmolysis
Answer

B) a daily (circadian) rhythm

Internal clock control. AS & A Level Biology · Topic 14 Homeostasis · 14.2 Homeostasis in plants

Biology MCQ · More A Level Biology: Homeostasis MCQs · Practise