passwella.
Menu

JAMB Biology 2002 Question 32

Question 32

Photosynthesis and Plant Nutrition

Use the diagram of the experiment to answer: Which of the following statements is correct about the experiment?

Diagram for this question
  1. A.The flask must be of the conical type
  2. B.Caustic soda can be replaced with distilled water
  3. C.The enclosed leaf will lose its green colour
  4. D.The leaves outside the flask serve as control.
Show the answer and explanation

Answer: D (The leaves outside the flask serve as control.)

Explanation

The leaf in the flask gets no carbon(IV) oxide because caustic soda absorbs it. The leaves outside the flask get normal air, so they are the comparison (control).