DENDROLOGY

Detailed explanation-1: -Respiration does not require sunlight and chlorophyll, photosynthesis requires these. Therefore this statement is false.-In old stems, gaseous exchange takes place through the stomata: Stomata are minute pores present in leaves. These pores diffuse atmospheric gases and transfer them to different parts of the plant.

Detailed explanation-2: -Respiration occurs all through the day, but the photosynthesis process occurs in the daytime, in the presence of sunlight only. Consequently, respiration becomes evident at night time in plants.

Detailed explanation-3: -Plants do not have a dedicated respiratory system in their bodies. However, they also require oxygen to respire. This is possible with the help of tiny opening present on the surface of their leaves known as stomata.

Detailed explanation-4: -Light has no effect on cellular respiration since cellular respiration is not light-dependent. Light indirectly impacts the rate of cellular respiration in plants by increasing light intensity, and surrounding temperature, lowering the quantity of glucose required for cellular respiration.

Detailed explanation-5: -Photosynthesis is the process that plants use in the presence of sunlight to convert carbon dioxide taken in by their leaves and water taken in through the roots to produce oxygen and sugar (glucose). This process takes place in the chloroplast of the plant cell with the presence of the green pigment of chlorophyll.