The living things and nonliving things in an area make up an

All organisms of the same kind that live in a particular area make up a

All populations that live together in the same place make up a

The various living things in an ecosystem, such as plants, animals, and bacteria, are known as

The nonliving parts of an ecosystem, such as water, minerals, sunlight, air, and soil are

What are the three cycles of an ecosystem?

There are three types of symbiosis.

_______________________________ is the attempt by organisms to obtain a resource that is available in a limited supply.

Each species has a different _____________________________, or role in the community.

A ____________________________________ is a model of the path that the energy in food takes as it moves from one organism to the next in an ecosystem.

Three types of organisms make up a food chain in an ecosystem. What are they?

How is a food web different from a food chain?

A model that shows how energy flows through a food chain is called an

A condition that controls the size or growth of a population is called a

If organisms cannot adapt to the changes in their ecosystem, they may become one of three things. List those three things.

The loss of any species affects _________________________________, or the wide variety of life on Earth.

The gradual replacement of one community by another is called

Explain the differences between a pioneer community and a climax community.