79. Community A and Community B both have 54 beetle species, but Community A has more total individuals than Community B. If you were to calculate the Shannon diversity index for both communities, what would be the result? (A) Community B would have a higher Shannon index value. (B) Community A would have a higher Shannon index value. (C) Community A and B would have equal values for the Shannon index. (D) Cannot predict the result based on this information.

80. In the northeastern Pacific ocean, sea otters occur at a relatively low abundance. By preying upon sea urchins, sea otters maintain underwater kelp (large algae) "forests", which would otherwise be decimated by the herbivorous sea urchins. The kelp forests supply food for a wide variety of marine organisms, as well as providing refuge from predation and nursery habitat for juveniles. Based on this, what type of species best describes sea otters? (A) indicator species (B) flagship species (C) keystone species (D) dominant species

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