24
QuizMultiple Choice

Unit Test — Unit test

Question 24 • Science 7 B (M12 25/26 S2)

Which statement best compares pioneer species with climax communities?

Answer
A
Both are involved with stages of succession, but climax communities are the beginning and pioneer species are the end result.
B
Both are involved with stages of succession, but pioneer species are the beginning and climax communities are the end result.
C
The appearance of each indicates that the number of species in the area is increasing.
D
The appearance of each indicates that the number of species in the area is decreasing.

Explanation

Ecological succession is the gradual change in a community over time. Pioneer species are the first organisms to establish themselves in a newly formed or disturbed area, while a climax community is the relatively stable community that develops later. Therefore, pioneer species mark the beginning of succession and climax communities its end result.

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