Balance Within Ecosystems

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The number of different species in an area is referred to as its

A biotic resource is

The series of changes that occur in an area where no ecosystem previously existed is called _______

The mating of California condors in zoos is an example of

An insect looks like a leaf, so it blends in with its surroundings and is hard for predators to see. The insect's characteristic is an example of a

If all members of a species disappear from Earth, the species is said to be

An abiotic resource is

A diverse pool of ____ helps ensure that individuals in a species will pass a variety of traits to their offspring