Biology 100- Unit 4 UPDATED ACTUAL
Exam Questions and CORRECT Answers
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.
Exam Questions and CORRECT Answers
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.
