Name two predators of snakes in a food web operating in a forest ecosystem.

Where does all the energy in living organisms originate from?

Why are there rarely more than five links (or five organisms) in a food chain?

Fill in the following blanks with suitable words :

(a) Ultraviolet rays can cause skin.................

(b) Pesticides enter the food chain at the ..............level

(c) Grass ………………………. Human

(d) lettuce …………………………. Fox

(e) Plants Antelope ……………….

What is ten per cent law? Explain with an example.