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AIPMT 2004 Biology Solved Paper

Question : 4

Total: 100

What is a keystone species?

A common species that has plenty of biomass, yet has a fairly low impact on the community's organization
A rare species that has minimal impact on the biomass and on other species in the community
A dominant species that constitutes a large proportion of the biomass and which affects many other species
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

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