Food chains, food webs and energy flow

Question 1 of 10

Organisms that make their own food are ___.

Question 2 of 10

Only about ___ per cent of energy passes to the next trophic level.

Question 3 of 10

In a food chain, bioaccumulation of pesticides is highest in

Question 4 of 10

The trophic level of a producer is the

Question 5 of 10

The total mass of living organisms in an area is the

Question 6 of 10

Decomposers

Question 7 of 10

Decomposers are part of every food chain.

Question 8 of 10

Nutrients are lost completely from the ecosystem.

Question 9 of 10

Distinguish between a food chain and a food web.

Question 10 of 10

A pyramid of energy is always