Succession and Extinction

Question 1

What is the role of a pioneer species in primary succession?

Revolt · Accepted Answer

to produce the soil

Question 2

Which is one event that may lead to Primary succession?

Revolt · Accepted Answer

volcanic eruption

Question 3

Which statement best describes ecological succession?

Revolt · Accepted Answer

It occurs after a disturbance.

Question 4

The number of rhinoceroses has decreased to near extinction. How are rhinoceroses classified under the Endangered Species Act?

Revolt · Accepted Answer

endangered

Question 5

Which disturbance would result in primary succession?

Revolt · Accepted Answer

the formation of Surtsey, a volcanic island off of the southern coast of Iceland

Question 6

According to the pie chart, which cause results in the most extinctions?

Revolt · Accepted Answer

introduced species

Question 7

Rhinoceroses are being poached at a rate of two or three a week in Africa and Asia. Which type of diversity is being lost as the population of rhinoceroses becomes very small?

Revolt · Accepted Answer

genetic diversity

Question 8

Which bar graph best represents the provided data?Cause of extinctionPercentage of total extinctionsIntroduced species39Habitat loss36Hunting and poaching23Other 2

Revolt · Accepted Answer

A bar graph titled Threats to Biodiversity shows cause of extinction on the horizontal axis and percent of total extinctions on the vertical axis. Introduced species, 39 percent; Hunting and poaching, 23 percent; Habitat loss, 36 percent; Other, 2 percent.

Question 9

In one species of bird, there are three varieties of feather color. What is this an example of?

Revolt · Accepted Answer

genetic diversity

Question 10

Which factor can cause secondary succession?

Revolt · Accepted Answer

clear cutting

Succession and Extinction Answers

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