Multiple choice

The evolution of giraffe with long neck was explained by Lamarck. Which of the following reasons was given by him?

  1. The frequent turning back of neck for itching gradually elongated the neck in successive generations.

  2. Eating of the foliage high up on the trees as there was no vegetation on the ground in the desert areas, gradually elongated the neck in successive generations.

  3. Giraffe rested with its neck pulled behind, which gradually elongated the neck in successive generations.

  4. Giraffe had 90% of its diet including bamboo, which gradually elongated its neck in successive generations.

  5. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Yes, it is correct. This pulling of neck for food was found in the giraffes of dry and arid deserts of Africa.

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