Answers FL-2000310-Biology 1 BUnit Test

Succession and Extinction Answers

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What is most likely to result immediately after a rainforest in Brazil is clear-cut?

secondary succession

primary succession

a climax community

increased biodiversity

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

endangered

threatened

extinct

pioneer

Why are lichens a good pioneer species after a volcanic eruption?

They are able to grow on moist soil.

They are able to grow on bare rock.

They are able to attract animals.

They are able to grow without water.

Which of the following could result in the extinction of a species?

harsh restrictions on poachers

increase in the habitat size of a species

adding a new species to the habitat

decrease tourism in protected areas

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

ecosystem diversity

species diversity

genetic diversity

color diversity

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

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, 36 percent; Habitat loss, 23 percent; Other, 2 percent.

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, 40 percent; Hunting and poaching, 20 percent; Habitat loss, 40 percent; Other, 0 percent.

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, 2 percent; Habitat loss, 36 percent; Other, 0 percent.

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.

Which is one event that may lead to Primary succession?

clear-cutting

climate change

volcanic eruption

introduced species

Which disturbance would result in primary succession?

harvesting wheat by using a combine harvester at the end of the growing season

controlled burning to stimulate the growth of forest trees such as sequoia

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

the effect of a large herd of elephants on the grasses and shrubs in an area

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?

species diversity

genetic diversity

ecosystem diversity

fragmented diversity

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

other

introduced species

habitat loss

hunting and poaching

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Succession and Extinction Answers

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