Question

The term 'Niche' denotes the \rule{2cm{0.15mm} role played by an organism in its environment.}

• A. chemical
• B. functional
• C. biological
• D. physical

Hint:

Shortcut: Habitat = Address (where)
Niche = Profession (what it does)

Answer 1

The Correct Option is B

Concept: In ecology, the term niche refers to the functional role and position of a species within an ecosystem. It describes how an organism interacts with both biotic and abiotic components of its environment.
• It includes the organism’s habitat, food habits, reproductive behavior, and interactions.
• It explains “what an organism does” in its ecosystem.
• It is different from habitat, which describes “where an organism lives”.

Step 1: Understand the meaning of niche.
The ecological niche represents the functional role played by an organism, including its role in energy flow and nutrient cycling.

Step 2: Analyze each option.
• (A) Chemical: Not related to ecological role
• (B) Functional: Correct, as niche defines the role/function
• (C) Biological: Too vague, not the standard definition
• (D) Physical: Refers more to habitat, not role

Step 3: Conclusion.
Thus, niche denotes the functional role played by an organism in its environment. Final Answer: Option (B)