AnswersFL-2000310-Biology 1 Sem 2 - FlexPopulation Size and Structure

Population Size and Structure Answers

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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.
3

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

A
immigration
B
emigration
C
birth rate
D
population
4

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
10

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
construction of dams to produce electricity
C
habitat destruction that decreases beaver population
D
habitat destruction that decreases beaver population
E
increased erosion due to improper farming techniques
F
increased erosion due to improper farming techniques
G
overfishing in artificial lakes
H
overfishing in artificial lakes
11

Typhoid fever is caused by bacteria in contaminated food or drink. In 1903, an outbreak of typhoid fever in Ithaca, New York, killed almost 80 people. In addition, more than 1,000 Ithaca residents became sick with the disease. The population shares the public water source. Which type of limiting factor was involved in the typhoid outbreak that occurred in Ithaca?

A
density-independent factor
B
density-dependent factor
C
population-dependent factor
D
population-independent factor
12

The construction of wind farms has affected the migratory patterns of some bird populations. Bird populations have been noted to no longer increase and sometimes even decrease in these areas. What is this known as?

A
a density-dependent limiting factor
B
a population-independent factor
C
a density-independent limiting factor
D
a population-dependent limiting factor
13

Which type of limiting factor affects a large population more than it affects a small population?

A
density dependent
B
density independent
C
population dependent
D
population independent
14

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
15

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
16

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

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