Succession involves one community replacing another. What must be true of each community that appers?

A. the population are adapted to their environment
B. the populations get larger as the next community is established
C.the populations contain very simple life forms
D.the populations move to a different area to reestablish themselves

B?

To determine the correct answer, let's analyze the given options:

A. "The population are adapted to their environment": This statement is partially true for succession, as it involves the adaptation of populations to changing environmental conditions. However, it does not necessarily have to be true for each community that appears during succession.

B. "The populations get larger as the next community is established": This statement is incorrect. In ecological succession, populations can initially be smaller as a new community is established. Over time, the populations may grow or change in size, but it is not a requirement for each community that appears.

C. "The populations contain very simple life forms": This statement is also incorrect. Succession does not dictate the complexity of the life forms in each community. It is possible for communities in succession to contain simple or complex life forms, depending on the specific ecological conditions.

D. "The populations move to a different area to reestablish themselves": This statement is not true in most cases of succession. Ecological succession typically occurs within the same area, where one community gradually replaces another.

Therefore, the correct answer is not B.