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Biology · 2026 · 3 marks
CBSE 2026 · Region 4 · Set 1 · Q28
There are many animals, which have become extinct in the wild, but continue to be maintained in zoological parks. Answer the questions that follow:…
There are many animals, which have become extinct in the wild, but continue to be maintained in zoological parks. Answer the questions that follow:
(a)
What type of bio-diversity conservation is observed in this case ?
(b)
Explain any other two ways which help in this type of conservation.
(c)
Besides zoological parks, mention one place that serves this purpose.
Marking-scheme solution
(a)
Ex-situ conservation.
(b)
-Cryopreservation – (–1960C) sperms or eggs or animal tissues or gametes and
embryos of threatened species can be stored .
-In vitro using tissue culture methods plants can be propagated
-Seed banks in which seeds of different genetic strains of commercially important
plants can be kept.
Botanical Gardens in which threatened plants can be conserved in special settings.
-Any other correct option with explanation.
(c)
Botanical Gardens , Wildlife safari parks
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CBSE Class 12 Biology past-paper question from the 2026 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.