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Biology · 2023 · 2 marks
CBSE 2023 · Region 1 · Set 1 · Q20
Ecological pyramids give important information about the ecological system, but do have some limitations. List any two limitations of ecological…
Ecological pyramids give important information about the ecological system, but do have some limitations. List any two limitations of ecological pyramids.
Marking-scheme solution
Doesn't take into account same species belonging to two or more trophic levels.
Assumes a simple food chain which never exists in nature/does not accommodate a food web.
Saprophytes are not given any place though they play an important ecological role.
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