Exams › NEET › Biology

What is a keystone species?

1. (a) 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
2. (b) A species which makes up a large proportion of the biomass and which affects many other species
3. (c) A species which has a small population, yet alters the structure of a community
4. (d) A rare species that has minimal impact on biomass and on other species in the community

Correct answer: (a) 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

Solution

A keystone species is defined by its disproportionate effect on an ecosystem relative to its abundance. Even though it contributes little biomass, removing it can dramatically change community organization and survival.

Related NEET Biology questions

• In India, human population is heavily weighted towards the younger age groups as a result of
• Association of animals when both partners are benefitted
• Competition for light, nutrients and space is most severe between
• A mutually beneficial association necessary for survival of both partners is
• Which one is true?
• It is much easier for a small animal to run uphill than for a large animal, because

⚔️ Practice NEET Biology free + battle 1v1 →