What do you mean by biological magnification?

What do you mean by biological magnificatioin?

What is meant by biological magnification ? With the help of a food chain, explain how biological magnification of harmful chemicals can occur.

What do you mean by PAR?

What do you mean by biological nitrogen fixation?

What do you mean by linear magnification of an image formed in a spherical mirror. Establish the expression of magnification.

What do you mean by linear magnification produced by a lens? Derive its various expressions.