A species that plays a critical role in maintaining the structure of an ecological community and helps to determine the types and numbers of various other species in the community is known as  

A.  a predator.
B.  a keystone species.
C.  the primary species.
D.  the dominant species.
E.  the alpha species.


B.  a keystone species.

Biology & Microbiology

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Biology & Microbiology