AnswersEnvironmental Science ASuccession and Extinction

Succession and Extinction Answers

10 verified answers1 views
1
Free Preview

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?

A
primary succession
B
secondary succession
C
a climax community
D
species extinction
2
Free Preview

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

A
endangered
B
threatened
C
extinct
D
pioneer
3

Which statement best describes ecological succession?

A
It is always caused by human intervention.
B
It occurs after a disturbance.
C
It never occurs in a predictable pattern.
D
It is a series of rapid changes in an ecosystem.
4

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

A
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.
Option A
B
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.
Option B
C
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.
Option C
D
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.
Option D
5

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

A
ecosystem diversity
B
species diversity
C
genetic diversity
D
color diversity
6

Which factors involving the activities of people are a threat to biodiversity?

A
pollution and succession
B
habitat loss and predation
C
poaching and habitat loss
D
succession and poaching
7

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

Question illustration
A
other
B
introduced species
C
habitat loss
D
hunting and poaching
8

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

A
They are able to grow on moist soil.
B
They are able to grow on bare rock.
C
They are able to attract animals.
D
They are able to grow without water.
9

The diagram below shows the stages of succession in a forest ecosystem. Which area shows the climax community of secondary succession?

Question illustration
A
A
B
B
C
C
D
D
10

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

A
secondary succession
B
primary succession
C
a climax community
D
increased biodiversity

Did you find these answers helpful?

More from this Course

Quiz
10 verified answers

Human Impact on the Environment-Standard Bio 1.5

Quiz
10 verified answers

Lab: Ecological Succession

Quiz
10 verified answers

Succession and Extinction-Standard Bio 1.4