Ecosystem Organisms Quiz

Producers are organisms that make their own food through photosynthesis or chemosynthesis

An omnivore eats both plants and animals

Saprophytes are bacteria and fungi that feed on living organic matter

Primary consumers feed on producers

Energy flows from one organism to the next by means of a food web

Herbivores eat meat only

Carnivores eat plants only

Decomposers feed on dead organic matter

Food chains are rarely more than five steps long because only 10% of the energy is transferred from one link to the next

Secondary consumers feed on primary consumers

An organism's trophic level is determined by its position in a food chain.

A food web is composed of multiple interconnected food chains.

Pyramids of numbers are limited because the size of organisms can change the standard shape.

A niche includes factors such as an organism's habitat and diet.

Two species can occupy the same niche for an extended period without competition.

The blackcurrant moth caterpillar is interdependent on the blackcurrant plant.

Primary consumers are found at the second trophic level.

A pyramid of numbers shows the biomass of organisms at each trophic level.

Tertiary consumers eat the herbivores in the second trophic level.

A pyramid of numbers is not affected by the size of organisms.