MCQOPTIONS
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| 1. |
Within biological communities, some species are important in determining the ability of a large number of other species to persist in the community. Such species are called |
| A. | Keystone species |
| B. | Allopatric species |
| C. | Sympatric species |
| D. | Threatened species |
| Answer» B. Allopatric species | |