Balance Within Ecosystems

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

• extinct

• endangered

• threatened

• keystone

The mating of California condors in zoos is an example of

• habitat preservation

• captive breeding

• biodiversity

• habitat destruction

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

• niche diversity

• climate

• habitat fragmentation

• biodiversity

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

• predator

• producer

• keystone species

• decomposer

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

• genes

• habitats

• species

• prey

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

• habitat destruction

• habitat preservation

• captive breeding

• habitat fragmentation

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 behavioral adaptation.

• True

• False

The illegal killing or removal of wildlife species from their habitats is called habitat fragmentation.

• True

• False

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

• True

• False

Secondary succession usually occurs slower than primary succession.

• True

• False