Q. Which of the following statements is not true about ecological niche?

Correct Answer: c) Number of species becomes small in ecological niche, if resources are sufficient.

Explanation: An ecological niche refers to the role and position a species has in its environment, including how it obtains resources, interacts with other organisms, and contributes to the ecosystem. Let us analyze each option:

a) Dominant species occupy extensive and broader ecological niche.

This is true. Dominant species often have a broader ecological niche because they are better adapted to utilize a wide range of resources and can outcompete other species.

b) Number of species becomes large in ecological niche of natural ecosystem, if resources are sufficient.

This is true. When resources are abundant and diverse, more species can coexist because competition is reduced, allowing for greater biodiversity.

c) Number of species becomes small in ecological niche, if resources are sufficient.

This is not true. If resources are sufficient, the number of species typically increases because there is less competition for limited resources, allowing more species to thrive. This statement contradicts ecological principles.

d) Dominance of single species becomes minimum if the resource distribution is equitable in a habitat.

This is true. When resources are distributed equitably, no single species can dominate the ecosystem, leading to a more balanced and diverse community.

Thus, the incorrect statement is c).