1.
The number of different types of species in an ecosystem.
2.
All organisms capable of breeding freely with each other under natural conditions.
3.
The physical appearance and characteristics of an organism.
4.
The cross-breeding of two different species.
5.
All the individuals of the same species living in an ecosystem.
6.
Efforts to preserve or protect natural species by careful use of resources.
7.
Individuals of any given species can have subtle differences or traits.
8.
A change that occurs in an entire population of a species, usually over a long period of time.
9.
A measure of diversity that takes into account the quantity of each species present, as well as the variety of different species present.
