Green plants are what, or organisms that make their own food?

A what is the role a population has in its habitat?

Dead organisms are broken down by what?

A what is a single member of a population?

A population that begins to decline may be listed as what?

An organism is what if all individuals are dead?

A what consists of all the populations of organisms in an ecosystem?

A what shows the feeding relationships among food chains?

Organisms take part in what for the limited amount of resources in an ecosystem?

A what shows the amount of energy available at each level of a food chain?

Different kinds of organisms sharing a long-term, close relationship is called?

A non-native organism brought into a country is called what?

Organisms that eat other living things to survive are called what?

Migrating south for the winter is a what for Canada geese?

Producers will always be the first organism in any what?

A what animal is at risk of becoming extinct?

The rainforest is a what for animals like panthers, parrots, and monkeys?