A) are most frequent
B) are present in maximum number
C) attain a large biomass
D) contribute to ecosystem properties
Correct Answer: D
Solution :
Within biological communities, some species may be important in determining the ability of large number of other species to persist in the community. These crucial species have been named as keystone species. Among the most obvious keystone species are top predators since they are often important in controlling herbivore populations.
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