Question

Which of the following statements are correct about limitations of ecological pyramids?
I. It does not take into account same species belonging to two or more trophic levels.
II. It considers a simple straight food chain which almost never occurs in nature.
III. Saprophytes are not placed in ecological pyramids however they play vital role.
IV. It considers food web specific to an ecosystem.
V. Only three types of pyramids are prevalent, while there can be more existing in nature.
Choose the correct option.

• A. I, II and V
• B. I, III and IV
• C. III, IV and V
• D. I, II and III

Answer 1

Answer: (D)

Statements I, II and III are correct about limitations of ecological pyramids.
Statements IV and V are incorrect. These can be corrected as
• Ecological pyramids does not accommodate a food web.
• Only three types of pyramids, i.e. number, biomass and energy are relevant to the ecosystem study.