Struggle between organism for the same resources. This keeps the size of a species population in check.

A consumer is:

Nonliving parts of the environment such as soil, water, sunlight.

A species of plant or animal that is facing imminent extinction or extirpation is said to be

An organism that is killed and eaten by another organism

A food web is more realistic than a food chain for showing the feeding relationships in ecosystems because:

Choose the phrase that correctly finishes this statement: "A species is..."

A group of organisms of the same species living in a particular area at a particular time

What is an ecosystem?

The largest population of any single species an area can hold that is determined by the available energy, water, oxygen and minerals available as well as by the interaction of organisms (food supply and competition).

A straight line representation that identifies specific feeding relationships between prey and predator.

Another name for heterotroph; An organism that obtains its energy from producers.

An organism that consumes dead organisms and organic waste, example – bacteria, fungus

Which of the following two organisms are producers?

A representation of interconnected food chains that show more complex feeding relationships between producers, consumers, and decomposers.