WAEC Biology 2013 Objective — Question 8
Question 8 of 60 from the West African Examinations Council (WAEC) Biology 2013 Objective paper, with the correct answer and a full explanation.
Advertisement
The opening of the guard cells of the epidermis in plants is by the process of
- A. osmosisCorrect
- B. diffusion
- C. active transport
- D. transpiration
Explanation
The opening and closing of the stomata is osmotically guarded: water flows into a guard cell by osmosis (due to its relatively high osmotic potential), it becomes turgid, and the stoma opens.
Advertisement
Sign up free to unlock
- Score tracking
- Practice history
- Saved questions
- Progress dashboard
- Personalized sessions
- Weak-topic breakdown
…and/or go further with premium services and No Ads.