Biology 100- Unit 4 UPDATED ACTUAL
Exam Questions and CORRECT Answers
2026
Which of the following would cause a population to grow? - Correct answer-an
increase in the birth rate and a decrease in the death rate of a population
Which of the following statements describes an example of population growth? -
Correct answer-The number of people in a town has increased by 25% in the past 5
years.
Scientists observed a population of 50 three-toed sloths over a year. They observed
21 births, 13 deaths, 5 individuals immigrate, and 8 individuals emigrate. What is
the population now? What is the rate of population growth in a percentage? It is
a/an population. - Correct answer-55, 10%, open (50+21+5-13-8=55)
Imagine that a mountain that supports a population of rare mountain goats suffers a
prolonged summer forest fire. This event is likely to _______________ population
size, and would be considered a density __________ factor. - Correct answer-limit,
independent
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, Most human populations experience a growth rate best described as - Correct
answer-exponential
The term _______ describes the interacting populations of different species (e.g.,
moose and ticks) within an ecosystem. - Correct answer-community
Which of the following is NOT an example of resource competition? - Correct
answer-Elk avoiding predators such as wolves
Competition is most likely to occur - Correct answer-when two species occupy
overlapping niches
As a result of competition, - Correct answer-one species may go extinct.
biodiversity may increase.
both species may divide resources and survive.
one or both populations are likely to decline.
>>any of the above is possible.
Bees and flowering plants, figs and fig wasps (as discussed in lecture) are
commonly used as examples of - Correct answer-mutualism
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Exam Questions and CORRECT Answers
2026
Which of the following would cause a population to grow? - Correct answer-an
increase in the birth rate and a decrease in the death rate of a population
Which of the following statements describes an example of population growth? -
Correct answer-The number of people in a town has increased by 25% in the past 5
years.
Scientists observed a population of 50 three-toed sloths over a year. They observed
21 births, 13 deaths, 5 individuals immigrate, and 8 individuals emigrate. What is
the population now? What is the rate of population growth in a percentage? It is
a/an population. - Correct answer-55, 10%, open (50+21+5-13-8=55)
Imagine that a mountain that supports a population of rare mountain goats suffers a
prolonged summer forest fire. This event is likely to _______________ population
size, and would be considered a density __________ factor. - Correct answer-limit,
independent
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Most human populations experience a growth rate best described as - Correct
answer-exponential
The term _______ describes the interacting populations of different species (e.g.,
moose and ticks) within an ecosystem. - Correct answer-community
Which of the following is NOT an example of resource competition? - Correct
answer-Elk avoiding predators such as wolves
Competition is most likely to occur - Correct answer-when two species occupy
overlapping niches
As a result of competition, - Correct answer-one species may go extinct.
biodiversity may increase.
both species may divide resources and survive.
one or both populations are likely to decline.
>>any of the above is possible.
Bees and flowering plants, figs and fig wasps (as discussed in lecture) are
commonly used as examples of - Correct answer-mutualism
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
