A) the gradual and predictable change in species composition occurs in a given area
B) the establishment of a new biotic community is very fast in its primary phase
C) the numbers and types of animals remain constant
D) the changes lead to a community that is in ear equilibrium with the environment and is called pioneer community.
Correct Answer: A
Solution :
The gradual and fairly predictable change in the species composition of a given area is called ecological succession. During succession some species colonize an area and their populations become more numerous, whereas populations of other species decline and even disappear.
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