Succession and Extinction

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.

-They are able to grow on bare rock.

Which factor can cause secondary succession? -clear cutting -glacial melting -competition -predation

-clear cutting

Which bar graph best represents the provided data? -a -b -c -d

-d

The number of rhinoceroses has decreased to near extinction. How are rhinoceroses classified under the Endangered Species Act? -endangered -threatened -extinct -pioneer

-endangered

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

-genetic diversity

According to the pie chart, which cause results in the most extinctions? -other -introduced species -habitat loss -hunting and poaching

-introduced species

Which factors involving the activities of people are a threat to biodiversity? -pollution and succession -habitat loss and predation -poaching and habitat loss -succession and poaching

-poaching and habitat loss

Which is one event that may lead to Primary succession? -clear-cutting -climate change -volcanic eruption -introduced species

-poaching by hunters

Which of the following is a growing threat to animals that are believed to be critical to the success of natural remedies? -competition for resources -disease and illness -poaching by hunters -increase in predators

-poaching by hunters

On May 18, 1980, Mount St. Helens in Washington State experienced a huge volcanic eruption after a magnitude 5.1 earthquake. During the eruption, hot ash and pumice poured down the west, south, and east sides of the mountain, melting the snow and ice at the top of the volcano and producing volcanic mudflows. Which type of process first occurred in the ecosystem around Mount St. Helens after it erupted? -primary succession -secondary succession -a climax community -species extinction

-primary succession

What is most likely to result immediately after a rainforest in Brazil is clear-cut? -secondary succession -primary succession -a climax community -increased biodiversity

-secondary succession

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

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

What is the role of a pioneer species in primary succession? -to destroy parasites -to provide shade -to provide fruit -to produce the soil

-to produce the soil

Which area shows the climax community of secondary succession? -A -B -C -D

NOT -B