Population Size Answers

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1
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When two species compete for the same ecological niche, they cannot coexist because they are competing for the exact same resources. One species is always slightly better adapted for the niche than the other, so over time the disadvantaged species will either go extinct or shift to a different ecological niche. This situation highlights the concept of _______.

A
carrying capacity
B
competitive exclusion
C
limiting factor
D
biotic factor
2
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Lions live in groups called prides. Lion populations would most likely fall in which category of population distribution?

A
even
B
random
C
clumped
D
density
3

A high birth to death ratio leads to smaller populations.

A
T
B
F
4

How does population density differ from population size?

A
Population size takes all organisms into account, while population density only takes specific age groups of the population into account.
B
Population size is the total number of organisms, while population density is the total number of organisms within a given area.
C
Population size is the total number of organisms within a given area, while population density is the total number of organisms of a specific age.
D
Population size is the total number of organisms of all species, while population density is the total number of organisms of a specific species.
5

Identify the biotic limiting factor from the choices below.

A
space
B
vegetation
C
water
D
climate
6

Which of the following species is a K-selected species?

A
Redwood trees
B
Fruit flies
C
Algae
D
Grasshoppers
7

Which of the following is an example of an even population distribution?

A
corn planted in a field
B
flocks of birds
C
people in a park
D
deer in a forest
8

R-selected species have a short life span and an early reproduction cycle.

A
T
B
F
9

Migration is _______.

A
the movement of organisms from a native location to a foreign location
B
the movement of organisms from a foreign location to a native location
C
the movement of organisms from their water supply to their food supply
D
the seasonal movement of organisms between locations
10

Which of the following statements about tolerance range is true?

A
Tolerance range is different for different organisms.
B
The tolerance range is the total number of organisms that can be supported by an ecosystem.
C
Tolerance range is affected by biotic factors in an ecosystem.
D
The available water supply does not impact an organism’s tolerance range.

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