Explain mutualism with the help of any two examples. How is it different from commensalism?

Explain mutualism with the help of an example.

Explain commensalism, with the help of an example.

Explain brood parasitism with the help of an example.

(a) What is polygenic inheritance? Explain with the help of a suitable example. (b) How are pleiotropy inheritance different from polygenic pattern of inheritance ?

Give any two examples of commensalism.

explain with the help of suitable examples the three different ways by which organisms overcome their stressful conditions lasting for stort duration .