Question 1

Of the following ecosystem types, which have been impacted the most by humans?

Accepted Answer

A)   wetland and riparian
B)   desert and high alpine
C)   taiga and second-growth forests
D)   tundra and arcticE) A) and D)
F) B) and C)

Question 2

If the sex ratio in a population is significantly different from 50:50, then which of the following statements will always be accurate?

Accepted Answer

A)   The population will enter the extinction vortex.
B)   The genetic variation in the population will increase over time.
C)   Modeling of the minimum viable population size will underestimate the actual population size.
D)   The effective population size will be less than the actual population size.E) C) and D)
F) None of the above

Question 3

Your friend is wary of environmentalists' claims that global warming could lead to major biological change on Earth. Which of the following statements can you use in response to your friend's suspicions?

Accepted Answer

A)   We know that atmospheric carbon dioxide has decreased over the past 150 years.
B)   Through measurements and observations, we know that carbon dioxide levels and temperature fluctuations are indirectly correlated.
C)   Global warming could have minor effects on agriculture in the United States.
D)   Scientist have evidence that climate change has already altered primary production, as well as ecosystem services.E) B) and D)
F) A) and C)

Question 4

Introduced species can have deleterious effects on biological communities by ________.

Accepted Answer

A)   competing with native species for resources and displacing them
B)   spreading rapidly in their new region
C)   reducing erosion
D)   increasing the biodiversity in their new regionE) A) and C)
F) C) and D)

Question 5

Philippe Bouchet and colleagues conducted a massive survey of marine molluscs on the west coast of New Caledonia. For 20% of the total species that were located and identified, only a single specimen was found. What does that suggest about the diversity of molluscs in this area?

Accepted Answer

A)   The west coast of New Caledonia is not an appropriate habitat for molluscs.
B)   Many of the species from this 20% are probably rare.
C)   They were not sampling uniformly throughout the area.
D)   Many of the species from this 20% are most likely just dispersing through the area.E) None of the above
F) A) and D)

Question 6

Use the following figure to answer the question.

Five new individuals were added to a small population of bighorn sheep in 1986, and ten more were added between 1990 and 1994. According to the figure, what occurred in this population after these additions?

Accepted Answer

A)   The population increased exponentially.
B)   The population increased in overall numbers.
C)   The population growth rate increased.
D)   The population continued to decline.E) C) and D)
F) A) and B)

Question 7

Overharvesting encourages extinction and is most likely to affect ________.

Accepted Answer

A)   animals that occupy a broad ecological niche
B)   large animals with low intrinsic reproductive rates
C)   most organisms that live in the oceans' coral reefs
D)   edge-adapted speciesE) C) and D)
F) A) and C)

Question 8

Use the following graph and information to answer the question.
Flycatcher birds that migrate from Africa to Europe feed their chicks a diet that is almost exclusively moth caterpillars. The graph shows the peak dates of flycatcher arrival in Europe, bird hatching, and peak caterpillar season for the years 1980 and 2000. The y-axis is a measure of the abundance of birds, hatching chicks, and caterpillars.

The shift in the peak of caterpillar season is most likely due to ________.

Accepted Answer

A)   earlier migration returns of flycatchers
B)   an innate change in the biological clock of the caterpillars
C)   global warming
D)   acid precipitation in EuropeE) All of the above
F) C) and D)

Question 9

Researchers have been studying a rare population of 87 voles in an isolated area. Ten voles from a larger population were added to this isolated population. Besides having ten additional animals, what benefits are there to importing individuals?

Accepted Answer

A)   There is no benefit other than increasing the overall population size.
B)   Additional voles will strengthen competition and increase the survival of the fittest.
C)   Additional animals would increase beneficial genetic drift.
D)   Additional voles from a distant population will likely increase genetic diversity and reduce inbreeding.E) A) and B)
F) B) and C)

Exam 56: Conservation Biology and Global Change

Overharvesting encourages extinction and is most likely to affect ________.

Correct Answer
verified

Of the following ecosystem types, which have been impacted the most by humans?

Correct Answer
verified

Use the following figure to answer the question. Five new individuals were added to a small population of bighorn sheep in 1986, and ten more were added between 1990 and 1994. According to the figure, what occurred in this population after these additions?

Correct Answer
verified

Researchers have been studying a rare population of 87 voles in an isolated area. Ten voles from a larger population were added to this isolated population. Besides having ten additional animals, what benefits are there to importing individuals?

Correct Answer
verified

If the sex ratio in a population is significantly different from 50:50, then which of the following statements will always be accurate?

Correct Answer
verified

Your friend is wary of environmentalists' claims that global warming could lead to major biological change on Earth. Which of the following statements can you use in response to your friend's suspicions?

Correct Answer
verified

Introduced species can have deleterious effects on biological communities by ________.

Correct Answer
verified

Philippe Bouchet and colleagues conducted a massive survey of marine molluscs on the west coast of New Caledonia. For 20% of the total species that were located and identified, only a single specimen was found. What does that suggest about the diversity of molluscs in this area?

Correct Answer
verified

Correct Answer
verified

Exam 56: Conservation Biology and Global Change

Overharvesting encourages extinction and is most likely to affect ________.

Correct AnswerverifiedShow Answer

Of the following ecosystem types, which have been impacted the most by humans?

Correct AnswerverifiedShow Answer

Use the following figure to answer the question. Five new individuals were added to a small population of bighorn sheep in 1986, and ten more were added between 1990 and 1994. According to the figure, what occurred in this population after these additions?

Correct AnswerverifiedShow Answer

Researchers have been studying a rare population of 87 voles in an isolated area. Ten voles from a larger population were added to this isolated population. Besides having ten additional animals, what benefits are there to importing individuals?

Correct AnswerverifiedShow Answer

If the sex ratio in a population is significantly different from 50:50, then which of the following statements will always be accurate?

Correct AnswerverifiedShow Answer

Your friend is wary of environmentalists' claims that global warming could lead to major biological change on Earth. Which of the following statements can you use in response to your friend's suspicions?

Correct AnswerverifiedShow Answer

Introduced species can have deleterious effects on biological communities by ________.

Correct AnswerverifiedShow Answer

Philippe Bouchet and colleagues conducted a massive survey of marine molluscs on the west coast of New Caledonia. For 20% of the total species that were located and identified, only a single specimen was found. What does that suggest about the diversity of molluscs in this area?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified