1. In plants, when photosynthesis rate equals the cellular respiration rate, whi

Question

1. In plants, when photosynthesis rate equals the cellular respiration rate, which of the following happens?

A. Growth will stop because the rate of breakdown of food molecules equals the rate of oxygen use.

B. Growth will increase because breakdown of food molecules equals the rate of carbon dioxide fixation into food molecules

C. Growth will stop because the rate of breakdown of food molecules equal the rate of carbon dioxide fixation into food molecules.

D. Growth will stop because the rate of food molecules breakdown is greater than the rate of oxygen use.

Explanation / Answer

Given that photosynthesis rate is equal to the cellular respiration rate.
That means rate of breakdown of food molecules is equal to the rate of oxygen use.
This results in no growth of plant.
Option A is the correct answer.

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