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UNIT 3 POPULATIONS APES EXAM
REVIEW QUESTIONS AND ANSWERS
2025
Write an equation for the rule of 70. What is it used for? -
correct answer- D.T. = 70/ growth rate (r)
What are the four factors used to determine population growth?
What is the equation? - correct answer- Births-increase size,
Deaths-decrease size, immigration-increase size, emigration-
decrease size Population change= (births+immigration)-
(deaths + emigration) Growth rate (r )= per capita birth rate-per
capita death rate
From the equation in #3, what factors add organisms to a
population? Which ones remove organisms from a population?
- correct answer- Organism size, energy used to make each
individual, number of offspring produced, timing of maturation,
life expectancy, lifetime reproductive events, survivorship curve
What is population momentum? - correct answer- consequence
of the demographic transition, explains why a population will
continue to grow even if the fertility rate declines
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List two characteristics of an r-selected species. - correct
answer- a) spend most of their time in Exponential growth (J
shaped curve)
b) maximize the reproductive rate
List two characteristics of a K-selected species. - correct
answer- a) low death rate, live to old age
b) maintain their population levels at K
A Whooping Crane is a __________ (r or k selected species)
and it is endangered because of the following: - correct answer-
K, number of birds released has been small and they are too
young for breeding
A California Condor is a ______ (r or k selected species) and it
is endangered because of the following: - correct answer- K,
population is threatened by poison ingestion, illegal egg
collection, habitat loss, and power lines
An Orangutan is a ____ (r or k selected species) and it is
endangered because of the following: - correct answer- K,
habitat destruction, illegal wildlife trade
UNIT 3 POPULATIONS APES EXAM
REVIEW QUESTIONS AND ANSWERS
2025
Write an equation for the rule of 70. What is it used for? -
correct answer- D.T. = 70/ growth rate (r)
What are the four factors used to determine population growth?
What is the equation? - correct answer- Births-increase size,
Deaths-decrease size, immigration-increase size, emigration-
decrease size Population change= (births+immigration)-
(deaths + emigration) Growth rate (r )= per capita birth rate-per
capita death rate
From the equation in #3, what factors add organisms to a
population? Which ones remove organisms from a population?
- correct answer- Organism size, energy used to make each
individual, number of offspring produced, timing of maturation,
life expectancy, lifetime reproductive events, survivorship curve
What is population momentum? - correct answer- consequence
of the demographic transition, explains why a population will
continue to grow even if the fertility rate declines
, 2 | Page
List two characteristics of an r-selected species. - correct
answer- a) spend most of their time in Exponential growth (J
shaped curve)
b) maximize the reproductive rate
List two characteristics of a K-selected species. - correct
answer- a) low death rate, live to old age
b) maintain their population levels at K
A Whooping Crane is a __________ (r or k selected species)
and it is endangered because of the following: - correct answer-
K, number of birds released has been small and they are too
young for breeding
A California Condor is a ______ (r or k selected species) and it
is endangered because of the following: - correct answer- K,
population is threatened by poison ingestion, illegal egg
collection, habitat loss, and power lines
An Orangutan is a ____ (r or k selected species) and it is
endangered because of the following: - correct answer- K,
habitat destruction, illegal wildlife trade
