SUCCESSION AND EXTINCTION

to create the soil
What is the role of a pioneer species in primary succession?
to destroy parasites
to create shade
to provide fruit
to create the soil
endangered
The number of rhinoceroses has decreased to near extinction. How are rhinoceroses classified under the Endangered Species Act?
endangered
threatened
extinct
pioneer
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introduced species
According to the pie chart, which cause results in the most extinctions?

http://media.edgenuity.com/evresources/3209-13-07/mc023-1.jpg

other
introduced species
habitat loss
hunting and poaching

secondary 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
NOT species diversity
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
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
clear cutting
Which factor can cause secondary succession?
clear cutting
glacial melting
competition
predation
D
Which bar graph best represents the provided data?

Cause of extinction
Percentage of total extinctions
Introduced species
39
Habitat loss
36
Hunting and poaching
23
Other
2

primary succession
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 creating volcanic mudflows. Which type of change was seen in the ecosystem around Mount St. Helens after it erupted?
primary succession
secondary succession
a climax community
species extinction
poaching and habitat loss
Which of the following are items that are a threat to biodiversity?
pollution and succession
habitat loss and predation
poaching and habitat loss
succession and poaching
genetic diversity
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
They are able to grow on bare rock.
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.
C
The diagram below shows the stages of succession in a forest ecosystem. Identify the point at which succession begins.

http://media.edgenuity.com/evresources/3209-13-07/mc008-1.jpg

The decomposition of the whale enriches the sediment.
How does a whale-fall community affect ocean sediment?
The decomposition of the whale enriches the sediment.
The remains of the whale pollute the sediment.
The sediment is transformed into food for mussels and crabs.
The bacteria that are attracted break down the sediment nearby.
the formation of Surtsey, a volcanic island off of the southern coast of Iceland
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
It always occurs in a predictable pattern.
Which statement best describes ecological succession?
It is always caused by human intervention.
It sometimes occurs after a disturbance.
It always occurs in a predictable pattern.
It is a series of rapid changes in an ecosystem.
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