Living things have the ability to adapt to their environment through

Saprophytes are otherwise called

The animal with has extremely short life span.

The uppermost layer of earth’s crust is 

The smallest living part of an animal or plant that is able to function independently is

The air blanket surrounding the earth is 

The light sensitive cells in plants are:

The rock layer on the surface of the earth is 

Earthworms breathe through their 

Who first classified living things into different categories?