Oxygen can enter the atmosphere during…………………………………………………….

Some sources of nitrogen compounds are……………………………. and fertilizer.

The role of……………………………………… is to recycle wastes and dead material.

……………… is an organism that feeds off another organism and causes it harm.

………………….is an organism that may or may not is harmed in a relationship.

…………………………is a long-term relationship between different species.

Both organisms need each other to survive in which of the following examples?

The group of all the populations in an area.

The place in which an organism lives.

The role that an organism has in an ecosystem.

When the last animal of a species dies, the species becomes …………………………………….

An ecosystem includes only the living organisms in a given area.

Banana slugs and slime molds are both decomposers.

A hummingbird’s long beak is a behavioral adaptation.

Carbon dioxide is a product of respiration and combustion.

Decomposers are not part of the nitrogen cycle.

Parasites are organisms that benefit their hosts.

All the biomes make up the biosphere.

A niche is where an organism lives in an ecosystem.