Balance Within Ecosystems

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

The mating of California condors in zoos is an example of

Which of the following is an example of how human activities may harm the balance in an ecosystem?

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

Which of the following is an example of a negative effect of agricultural technology on the environment?

A species that influences the survival of many other species in an ecosystem is called a(n) _________________________.

In the process of _______________, the organisms that are best suited to their environments are most likely to survive and reproduce.

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

Setting aside a marsh as a wildlife refuge is an example of the _________________________ approach to protecting biodiversity.