Name :

1. Two main modes of nutrition in the organisms.
2. Four essential requirements for the process of photosynthesis.
3. Two categories of cells in the mesophyll of leaves.
4. Two types of tissues of vascular system.
5. Two types of respiration in the organisms.

Define the following terms :

1. Autotrophs
2. Photosynthesis
3. Respiration
4. Vascular system
5. Stomata

What is the source of energy for photosynthesis?

Do the plants respire all day and night or only during the day? Give reasons.