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  1. What is a keystone species?
    1. A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community’s organization and survival
    2. A common species that has plenty of biomass, yet has a fairly low impact on the community’s organization
    3. A rare species that has minimal impact on the biomass and on other species in the community
    4. A dominant species that constitutes a large proportion of the biomass and which affects many other species.
Correct Option: A

A keystone species is the one which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community’s organization and survival.



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