A) A species which adds up to only a small proportion of the total biomass of a community, yet has a huge impact on the communitys organization and survival
B) A common species that has plenty of biomass, yet has a fairly low impact on the communitys organization
C) A rare species that has minimal impact on the biomass and on other species in the community
D) A dominant species that constitutes a large proportion of the biomass and which affects many other species
Correct Answer: A
Solution :
Species having much greater influence on community characteristics, relative to their low abundance or biomass are called keystone species, e.g., in tropical forests, figs are keystone species. Removal of these species causes serious disruption in the functioning of community.
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