1.
Variety in an ecosystem
2.
Organisms in an environment that interact
3.
Organisms fighting over resources
4.
Organisms working together
5.
Things that determine how much a population can grow
6.
The maximum number of organisms a population can have
7.
Organisms moving into an area with no soil
8.
Organisms moving into an area with soil
11.
the environment where organisms interact and live
12.
the first organisms to move into a new ecosystem
