Question

Suppose we conduct an experiment to demonstrate respiration in a green plant. What special precaution is required to be taken in it?

Answer 1

The precaution that should be taken during the experiment is to keep the setup in a dark place so that photosynthesis does not occur.

1. Respiration causes the generation of $C{O}_2$ whereas photosynthesis utilizes this $C{O}_2$ to make food.
2. If photosynthesis takes place along with respiration, enough of $C{O}_2$ will not be present to be detected and the result will be negative as the rate of photosynthesis is higher than that of respiration in presence of light and other nutrients.