biodiversity

Based on the graph shown, what is the effect of removing a keystone species on an ecosystem?

• richness oscillates between extremes

• richness stabilizes

• richness increases

• richness decreases

Biodiversity, aka biological diversity, usually refers to

• the same species in a general location

• the number of different species in a given area

• the number of animal species in a given area

• the number of plant species in a given area

Species that are clearly critical to the functioning of an ecosystem are known as

• biodiversity

• keystone species

• main species

• native species

An endemic species is

• exotic and found everywhere

• exotic and found only in certain regions

• native and found only in a limited area

• native and found everywhere

A population is

• a group of similar species in different areas

• a group of the same species in the same geographic area.

• a group of several species in the same geographic area

• a group of several species along with their abiotic factors in a small area.

A community is

• Several different populations scattered across several states.

• Several different organisms in the same geographic area

• One type of organism in the same geographic area

• Several different populations in the same geographic area

An indicator species

• is sensitive to habitat change

• is a species whose presence signals habitat health

• can provide a critical resource for an ecosystem

• signals the complexity of the ecosystem

Eutrophication occurs when

• too many nutrients build up in a body of water

• algae and photosynthetic bacteria grow out of control

• biodiversity is too intense for a body of water

• decomposition uses the oxygen in the weater

An environment that is too low in oxygen to support oxygen-dependent life is

• hypertoxic

• hypotonic

• illegal

• hypoxic

The three types of biodiversity are

• genetic

• symbolic

• ecosystem

• regulatory

• species