What criteria can be used to decide whether something is alive?

What is chlorophyll ? What part does chlorophyll play in photosynthesis?

(i) Which simple food is prepared first in the process of photosynthesis ?

(ii) Name the food which gets stored in plant leaves.

What is meant by life processes? Name the basic life processes common to all living organisms which are essential for maintaining life.

What are autotrophs? Give one example of autotrophs.