AIPMT PRELIMS2004Botany-Ecology
AIPMT PRELIMS 2004 Botany Community Ecology MCQ Question
Type: MCQ-conceptual-Medium-Class 12
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
Correct Answer
Option B
Detailed Explanation
A keystone species has a disproportionately large effect on its environment relative to its abundance, playing a critical role in maintaining the structure of an ecological community.
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