An ecosystem has two components:

Which of the following are called key industry animals?

What percentage of photosynthetically active radiation $(PAR)$ can be captured by plants?

Sometimes,due to biotic or abiotic factors,the climax community remains in a particular seral stage (pre-climax) without reaching the final climax. Do you agree with this statement? If yes,provide a suitable example.

The functional unit of nature is:

Plant succession occurring in a sandy area is known as: