Give three examples of the range of variations that you see in life-forms around you.

(i) Organisms of varying size which includes organisms from microbes to big mammals .

(ii) Organisms which differ in the pigmentation of various components in their body giving rise to transparent organisms and colour varying organisms from black crow to white swan.

(iii) Organisms which differ in their life span includes grass whose lifespan is around 7 to 10 years and redwood tree whose lifespan is around 500 to 700 years.