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Biology · 2024 · 2 marks
CBSE 2024 · Region 1 · Set 1 · Q18
Observe the picture given below. Name the naturalist and write the explanation given by him that evolution of life forms had occurred on the basis of…
Observe the picture given below. Name the naturalist and write the explanation given by him that evolution of life forms had occurred on the basis of this example.
Marking-scheme solution
Name of the Naturalist –Lamarck
-Evolution of life forms driven by use and disuse of organs.
-He said Giraffes in an attempt to forage leaves on tall trees had to adapt by
elongation of their necks.
-They passed on this acquired character of elongated neck to their succeeding generations
and slowly over the years all the future generations had long necks.
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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.