ENVS 1126 Aixin Hou-Exam 1 Questions
And Answers 2025|2026 Verified
Graded A+ Already Passed!
Why is exponential growth unsustainable?
a. A species cannot exceed carrying capacity indefinitely.
b. It produces too many old individuals.
c. It is found only in r-selected species. - CORRECT ANSWER-A species
cannot exceed carrying capacity indefinitely.
Which of the following is not a part of environmental resistance to
population growth?
a. Lack of nutrients
b. Reproductive rate
c. Parasites
d. Predators - CORRECT ANSWER-Reproductive rate
Which one of the following is a density-independent factor that is not
involved in maintaining population equilibrium?
a. Food supply
,b. Competition
c. Predation
d. Drought - CORRECT ANSWER-Drought
Some beetles escape from a ship and fly to a small island covered with
grass but with no trees or beetle predators. As the beetles feed, they
destroy all the grasses. But with abundant food, the beetle population
soars, doubling in size every month. After about a year, the population
crashes as thousands of beetles have destroyed almost all of the plants
and there is little left to feed the large population. This scenario best
illustrates
a. logistic growth ending at its carrying capacity.
b. a population that has stabilized near its carrying capacity.
c. constant growth followed by equilibrium.
d. exponential growth followed by a population crash. - CORRECT
ANSWER-exponential growth followed by a population crash.
The population of game fish in a lake is under heavy fishing pressure. If
too many fish are caught, the population will crash and future years of
fishing will suffer. The game fish can exhibit logistic growth under
certain circumstances. Assuming logistic growth, it would be best to
, manage this game fish population by permitting the harvesting of just
enough fish to keep the game fish population
a. above its carrying capacity.
b. at 10% of its carrying capacity.
c. at its full carrying capacity.
d. at 50% its carrying capacity. - CORRECT ANSWER-at 50% its carrying
capacity
Which one of the following statements is true?
a. R-strategists have high biotic potential and poor recruitment most of
the time.
b. R-strategists have high biotic potential and good recruitment most of
the time.
c. R-strategists have low biotic potential and poor recruitment most of
the time.
d. R-strategists have low biotic potential and good recruitment most of
the time. - CORRECT ANSWER-R-strategists have high biotic potential
and poor recruitment most of the time.
Which one of the following is characteristic of a K-selected species?
a. short life span
And Answers 2025|2026 Verified
Graded A+ Already Passed!
Why is exponential growth unsustainable?
a. A species cannot exceed carrying capacity indefinitely.
b. It produces too many old individuals.
c. It is found only in r-selected species. - CORRECT ANSWER-A species
cannot exceed carrying capacity indefinitely.
Which of the following is not a part of environmental resistance to
population growth?
a. Lack of nutrients
b. Reproductive rate
c. Parasites
d. Predators - CORRECT ANSWER-Reproductive rate
Which one of the following is a density-independent factor that is not
involved in maintaining population equilibrium?
a. Food supply
,b. Competition
c. Predation
d. Drought - CORRECT ANSWER-Drought
Some beetles escape from a ship and fly to a small island covered with
grass but with no trees or beetle predators. As the beetles feed, they
destroy all the grasses. But with abundant food, the beetle population
soars, doubling in size every month. After about a year, the population
crashes as thousands of beetles have destroyed almost all of the plants
and there is little left to feed the large population. This scenario best
illustrates
a. logistic growth ending at its carrying capacity.
b. a population that has stabilized near its carrying capacity.
c. constant growth followed by equilibrium.
d. exponential growth followed by a population crash. - CORRECT
ANSWER-exponential growth followed by a population crash.
The population of game fish in a lake is under heavy fishing pressure. If
too many fish are caught, the population will crash and future years of
fishing will suffer. The game fish can exhibit logistic growth under
certain circumstances. Assuming logistic growth, it would be best to
, manage this game fish population by permitting the harvesting of just
enough fish to keep the game fish population
a. above its carrying capacity.
b. at 10% of its carrying capacity.
c. at its full carrying capacity.
d. at 50% its carrying capacity. - CORRECT ANSWER-at 50% its carrying
capacity
Which one of the following statements is true?
a. R-strategists have high biotic potential and poor recruitment most of
the time.
b. R-strategists have high biotic potential and good recruitment most of
the time.
c. R-strategists have low biotic potential and poor recruitment most of
the time.
d. R-strategists have low biotic potential and good recruitment most of
the time. - CORRECT ANSWER-R-strategists have high biotic potential
and poor recruitment most of the time.
Which one of the following is characteristic of a K-selected species?
a. short life span
