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 biomass, which affects many other species
C) A common species that has plenty of biomass, yet has a fairly low impact on the community's organization
D) 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
Correct Answer: D
Solution :
[d] Key stone species means, 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, e.g., elephants damage trees by browsing the lower branches, stripping the bark and uprooting them. It prevents the forest from encroaching of the grasslands, where grazing beasts flourish.
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