Population Size Answers

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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
23

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.
24

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

A
Redwood trees
B
Fruit flies
C
Algae
D
Grasshoppers

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Population Size Answers — Environmental Science A