Question

Lamarckism fails to explain which of the following phenomenon?

• A. Absence of all the four limbs amongst amphibians.
• B. Exceptionally long neck of giraffe.
• C. An intellectual having a dull son.
• D. Loss of vision in cave-dwelling mammals.

Answer 1

The correct option is C An intellectual having a dull son.

Some amphibians are devoid of all of the four limbs, it is explained by Lamarckism.

The ancestors of giraffe were bearing a small neck and fore­limbs and were like horses. But as they were living in places with no surface vegetation, they had to stretch their neck and fore-limbs to take the leaves for food, which resulted in the slight elongation of these parts, it is explained by Lamarckism.

The ancestors of cave dwellers had normal eye sight. On account of living under continuous dark conditions, the animal lost their power to see, it is explained by Lamarckism.

However, Dull progeny of Nobel Prize winners cannot be explained by Lamarckism. It could not explain that why the kids of Nobel Laureates have dull children.

Therefore, the correct answer is option C.