Question 15
Photosynthesis and Plant NutritionUse the diagram (parts labelled I to IV, surface view of leaf epidermis with stomata) to answer this question.
The structure that will be stained blue-black by iodine is labelled
- A.I
- B.II
- C.III
- D.IV
- E.V
Show the answer and explanation
Answer: A (I)
Explanation
Iodine turns starch blue-black; starch is formed in the chloroplasts (I) of the guard cells.