Class 12 · Evolution

Lamarckism and Acquired Characters — NEET Biology

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He gave the examples of Giraffes who in an attempt to forage leaves on tall trees had to adapt by elongation of their necks. As they passed on this acquired character of elongated neck to succeeding generations, Giraffes, slowly, over the years, came to acquire long necks. Nobody believes this conjecture any more.

NCERT Biology · Class 12 · Chapter 6 · Paragraph 29
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The example used by Lamarck to explain evolution was

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Correct answer: A giraffe’s neck

He proposed that giraffes stretched their necks over generations, passing this trait on.

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What does NCERT say about He gave examples Giraffes?
He gave the examples of Giraffes who in an attempt to forage leaves on tall trees had to adapt by elongation of their necks. As they passed on this acquired character of elongated neck to succeeding generations, Giraffes, slowly, over the years, came to acquire long necks.
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Evolution, Class 12 NCERT Biology.

Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.

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