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Biology · 2023 · 3 marks
CBSE 2023 · Region 3 · Set 1 · Q28
Explain the following population interactions with the help of one example each: (a) Brood Parasitism (b) Co-evolution of mutualists
Explain the following population interactions with the help of one example each :
(a)
Brood Parasitism
(b)
Co-evolution of mutualists
Marking-scheme solution
(a) Parasitic bird lays resembling eggs in the nest of host bird
Cuckoo (Koel) lay eggs in the nest of crow
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Eggs of cuckoo (Koel) have evolved in time to resemble the eggs of the crow, koel lays eggs in the nest of the crow and lets them be hatched there, cuckoo is the parasitic bird here exhibiting brood parasitism.
(b) When evolution of one species is tightly linked with the evolution of other species
Plant pollinator interaction / fig species and wasp
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CBSE Class 12 Biology past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.