(ecology) a group of interdependent organisms inhabiting the same region and interacting with each other the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist the type of environment in which an organism or group normally lives or occurs organism's role, or job, in its habitat a well-substantiated explanation of some aspect of the natural world a generalization that describes recurring facts or events in nature process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest change in a kind of organism over time; process by which modern organisms have descended from ancient organisms English natural scientist who formulated a theory of evolution by natural selection (1809-1882) the process of adapting to something (such as environmental conditions)

1. community

(ecology) a group of interdependent organisms inhabiting the same region and interacting with each other

2. biosphere

the regions of the surface and atmosphere of the Earth (or other planet) where living organisms exist

3. habitat

the type of environment in which an organism or group normally lives or occurs

4. niche

organism's role, or job, in its habitat

5. theory

a well-substantiated explanation of some aspect of the natural world

6. law

a generalization that describes recurring facts or events in nature

7. natural selection

process by which individuals that are better suited to their environment survive and reproduce most successfully; also called survival of the fittest

8. evolution

change in a kind of organism over time; process by which modern organisms have descended from ancient organisms

9. darwin

English natural scientist who formulated a theory of evolution by natural selection (1809-1882)

10. adaptation

the process of adapting to something (such as environmental conditions)