Biology 100- Unit 4 Exam Questions
and Answers Graded A+
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
, 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
For the following picture, identify which organisms are producers, 1' consumers, 2'
consumers, and 3' consumers. (Some organisms have more than one role). -
CORRECT ANSWER-Producers: Trees, grass
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED
and Answers Graded A+
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
, 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
For the following picture, identify which organisms are producers, 1' consumers, 2'
consumers, and 3' consumers. (Some organisms have more than one role). -
CORRECT ANSWER-Producers: Trees, grass
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED
