Question

Hugh described two substances which participate in photosynthesis.

Substance A: Source of energy for plant-eating animals
Substance B: Combines with sunlight and carbon dioxide

Which statement is correct?

A. Substance A is water and Substance B is oxygen.
B. Substance A is glucose and Substance B is water.
C. Substance A is water and Substance B is chlorophyll.
D. Substance A is chlorophyll and Substance B is oxygen.

Answer 1

B. Substance A is glucose and Substance B is water.

Answer 2

The answer is B because glucose is an energy source and during photosynthesis, water combines with sunlight and carbon dioxide. You can observe by the chemical equation for photosynthesis : 6CO2 + 6H2O + light energy = C6H12O6 + 6O2