Population Growth Answers

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Which best describes the following impacts: water storage, clean energy, and flood prevention?

A
positive impact of a density-dependent limiting factor
B
positive impact of a hurricane
C
positive impact of beavers in an ecosystem
D
positive impacts of dams on society
2
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Which human activity can produce disruption of fish breeding habits, increase in mosquito population, and flood control?

A
construction of dams to produce electricity
B
habitat destruction that decreases beaver population
C
increased erosion due to improper farming techniques
D
overfishing in artificial lakes
3

What will most likely increase if there is a high death rate?

A
immigration
B
emigration
C
birth rate
D
population
4

A square kilometer of forest has 200 deer. What is the term that is used to describe this number?

A
density-dependent
B
birth rate
C
limiting factors
D
population density
5

The great hornbill and the toucan both eat the same fruit, insects, and nuts. They both live in the rainforest. Their large bills function to get food and also as warning coloration. Which of the following is a limiting factor to the toucan population?

A
overlapping breeding seasons
B
bill coloration
C
genetic variability
D
competition
6

A population of elephants becomes too large, and several members leave the population. What is this process called?

A
death rate
B
immigration
C
emigration
D
births
7

A population of cheetahs has a birth rate of 5 and a death rate of 15. Immigration is 2, and emigration is 4. What is its population growth?

A
–14
B
–12
C
12
D
14
8

Poison dart frogs live in the rainforest. They produce a poison by eating toxic fire ants. The only known predator is a snake, Liophis epinephelus. Which is most likely a density-independent factor that affects the poison dart population in the rainforest?

A
clear cutting the rainforest
B
limited food source
C
susceptibility to disease
D
increase in population of Liophis epinephelus
9

Predict what might happen to a population that is experiencing little immigration and emigration, low birth rate, and high death rate.

A
The population decreases.
B
The population increases.
C
The population grows too much too fast.
D
The population grows outside of its habitat.
10

Which two factors can both cause a population to increase?

A
birth rate and emigration
B
birth rate and immigration
C
death rate and immigration
D
death rate and emigration

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