Q. Consider the following statements regarding ecological pyramids:

1. They consider the same species as belonging to two or more trophic levels.
2. Saprophytes are not assigned any place in ecological pyramids.
3. Ecological pyramids do not take into account complex food webs.

Which of the above statements is / are correct?
Answer: Only 2 and 3
Notes: Ecological pyramids have limitations: they do not assign any position to saprophytes, and they represent only simple linear food chains, not complex food webs. Also, they do not account for species that occupy more than one trophic level. Therefore, only statements 2 and 3 are correct.