Living things depend on many different _________ in order to survive.

Environments include both _____ and _____ things.

For populations to continue to survive, some organisms in the population must _________.

Characteristics such as height, hair color, and eye color are ________ factors.

Ecosystems depend on organisms to ________ with each other to maintain stability.

Organisms are the ________ things in an ecosystem.

Air, water, and sunlight are all ________ components of an ecosystem.

Wildlife biologists study _____.

Plants compete for air, water, ________ within ecosystems.

An invasive species is a plant or animal that is ________ to an ecosystem.

What is a community of interacting organisms and their environment called?

What member of an ecosystem produces oxygen, and also provides homes for animals?

What is necessary for an organism to survive in an ecosystem?

What makes a healthy ecosystem?

How can humans reduce our negative effect on ecosystems?

Which are examples of non-living parts of an ecosystem?

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