1.

What is a keystone species [CBSE PMT 2004]

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


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