Differentiate fundamental vs realized niche with an ecological example.

• A. Fundamental niche is the full range of environmental conditions under which a species could survive and reproduce; realized niche is the subset actually inhabited due to interactions.
• B. Fundamental niche is the actual distribution; realized niche is the potential distribution.
• C. Realized niche is the subset of the fundamental niche affected by competition.
• D. Fundamental niche refers to energy flow.

Answer: (A)