Population and Communities in an Ecosystem

To reduce competition, the role of an organism in its habitat is called its

• adaptation

• host

• niche

• parasite

A pioneer species moving into an area is an example of primary succession.

• True

• false

Natural disruptions to an ecosystem is an example of secondary succession.

• True

• False

Soil present is an example of secondary succession.

• True

• False

No soil or organisms initially is an example of Primary succession.

• True

• False

Secondary Succession occurs rapidly

• True

• False

Lichens dissolving rock into soil is an example of primary succession.

• True

• False

Cheetahs are endangered, predatory mammals that live in sub-Saharan Africa. Which of the following are reasons that animals become endangered?

• too much diversity

• low genetic diversity

• abundant resources

• environmental changes

• loss of habitat

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Some scientists think humans are living in the period of the next mass extinction. There are two ways extinction occurs. What is the difference between the two kinds of extinctions?

• mass extinction occurs slowly and eliminates one species

• mass extinction occurs quickly and kills many species, background extinction occurs slowly and eliminates one species.

• a mass extinction occurs from competition

• a mass extinction occurs due to slow environmental changes, and a background extinction is due to disease outbreak

What examples of ecosystem services are exhibited in this image? Choose the three that apply.

• Water

• soil

• wind

• gases

• food

Tags

NGSS.MS-LS2-5