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प्रश्न
According to Lamarck, a giraffe has a long neck because ______.
विकल्प
God designed it that way
catastrophes eliminated short-necked forms
its ancestors stretched their necks to get food
ancestral giraffes with slightly longer necks got more food than others and left more surviving offspring
MCQ
रिक्त स्थान भरें
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उत्तर
According to Lamarck, a giraffe has a long neck because its ancestors stretched their necks to get food.
Explanation:
According to Lamarck’s theory of acquired inheritance, a giraffe has a long neck because its ancestors stretched their necks to reach leaves on tall trees, and these acquired changes were passed on to their offspring. This contrasts with Darwin’s theory, which emphasizes natural selection acting on variation in populations.
shaalaa.com
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