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Biology · 2024 · 3 marks
CBSE 2024 · Region 5 · Set 2 · Q22
(a) How is the grazing food chain different from the detritus food chain? (b) "The detritus food chain may be connected to the grazing food chain at…
(a)
How is the grazing food chain different from the detritus food chain ?
(b)
"The detritus food chain may be connected to the grazing food chain at some levels in an ecosystem." Give an example in support of the statement.
Marking-scheme solution
(a)
(b)
Some organisms of DFC are prey to GFC animals and in a natural
ecosystem some animals like cockroach or crow etc. are omnivores
Grazing Food chain
Detritus Food Chain
Begins with producers
Begins with dead organic
matter/detritus
Second trophic level is
occupied by herbivores
Second trophic level is
occupied by detrivores
Major conduit for
energy flow in aquatic
ecosystem
Major conduit for energy
flow in terrestrial
ecosystem
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CBSE Class 12 Biology past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.