Question

Keystone species... 1. occur only in intertidal zones 2. play an unusually important role in determining the species composition in a habitat 3. can be removed from a habitat without any impact on the remaining species in the community 4. are primary producers and therefore usually are plants 5. are more expendable than commensal species, from a conservation perspective

Answer 1

Answer: Keystone species:

2. play an unusually important role in determining the species composition in a habitat.

Explanation: This are either animals or plants that play a unique role in the ecosystem. If they are removed, there would be an imbalance in the way the ecosystem would be.