Ecology

Question 1 of 10

Organisms that break down dead matter are

Question 2 of 10

In a food chain, the organisms that make their own food are the

Question 3 of 10

Which factor is a biotic factor?

Question 4 of 10

Energy is lost at each trophic level mainly as

Question 5 of 10

In a food chain, green plants are the

Question 6 of 10

The role an organism plays in its ecosystem is its

Question 7 of 10

The relationship in which both organisms benefit is

Question 8 of 10

Only about 10% of energy passes to the next trophic level. If producers fix 10,000 kJ, energy reaching secondary consumers is about

Question 9 of 10

In a predator–prey cycle, predator numbers usually peak

Question 10 of 10

Organisms that break down dead matter and return nutrients to the soil are