Question

What is a keystone species ?

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

Answer 1

Answer: (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

Answer 2

A keystone species is 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.