In the experiment to show that CO2 is released during respiration, dry gram seeds are not used because:a)they release O2 during respiration b)they do not photosynthesis c)they do not respire d)they respire but release both CO2 and O2

Dry gram seeds do not respire or they do not produce enough carbon dioxide to turn lime water milky; thus, they are not use in experiment to show that carbon dioxide is released during respiration. For such experiments, germinating seeds are used.

Hence, the correct answer is (c).