19
QuizMultiple Choice

Population Size

Question 19 • Environmental Science A

Which of the following statements about tolerance range is true?

Answer
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.

Explanation

Tolerance ranges differ among organisms because each species can survive and reproduce under a different range of environmental conditions. For example, one species may tolerate a wider range of temperatures than another. The total number of organisms an ecosystem can support is its carrying capacity, not a tolerance range, and water availability can affect an organism’s tolerance.

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