A special relationship between organisms that lasts a long time is _________________.

Because each area has a certain _________________, it can only support a limited population.

Water is a(an) _________________ that restricts the growth of populations in an ecosystem.

When two organisms benefit in a symbiotic relationship, the relationship is called _______________.

A symbiotic relationship in which one organism benefits while the other is harmed is ______________.

A relationship in which one organism benefits and the other is not harmed is ___________.

The place in which an organism lives and hunts for food is its _______________.

The particular role that an organism plays in a community is its _______________.

In ________________, the parasite harms the ______________ organism it lives on or in.

__________ limits competition as organisms develop relationships that allow them to live together.

When the population of an area ______________ its carrying capacity, some plants or animals begin to die off.

Each ecosystem has certain limiting factors that restrict the size of its populations. These include water, temperature, soil types, and the amount of ______________ available.

A symbiotic relationship that benefits only one organism, but does no harm to the other is known as ___________________.

Living things _________________________________ for resources in an ecosystem.

The population that an area can support is its _____________________.

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