Environmental Chapter 10 Test Bank

___ usually refers to the number of different species in an area.

• Biodiversity

• Extant

• Habitat

• Community

The most diverse and plentiful animal group is ___ .

• mammals

• reptiles

• birds

• insects

____ diversity refers to the number of different species in an area

• Species

• Ecosystem

• Genetic

____ diversity refers to the variety of habitats, communities, and ecological processes within and between ecosystems.

• Species

• Ecosystem

• Genetic

____ diversity refers to all the different genes contained within all members of a population.

• Species

• Ecosystem

• Genetic

The more biodiversity an ecosystem has the less stable it is.

• True

• False

The lost of a keystone species can destroy a/n ___.

• food web

• ecosystem

• none of these

• food web and ecosystem

The kelp beds off the coast of California were almost destroyed because of the lost of which keystone species?

• orcas

• sea otters

• sea urchins

• dolphins

Sea otters can eat ____ sea urchins in one day.

• 50

• 500

• 1000

• 1500

If a species goes through a "bottleneck" ____ diversity is reduced.

• ecosystem

• species

• genetic