Question

What is keystone species?

• A. A species which makes up only small portion of the total biomass of a community yet, has a huge impact on the community's organization and survival
• B. A common species that has plenty of biomass yet, has a fairly low impact on the community's 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

Answer 1

The correct option is A

A species which makes up only small portion of the total biomass of a community yet, has a huge impact on the community's organization and survival

A keystone species is a species which makes up only small portion of the total biomass of a community yet, has a huge impact on the community's organization and survival. This plays a major role in balancing the ecosystem.