Question

From Lamarck’s theory, giraffes have long necks because ______

(a) nature selected long trees

(b) humans preferred only long-necked ones

(c) of the sudden change of short to long necks

(d) stretching of necks over many years by short-necked ones

The question was asked during an online interview.

Enquiry is from Biological Evolution topic in chapter Evolution of Biology – Class 12

Answer 1

The correct option is (d) stretching of necks over many years by short-necked ones

The explanation: According to Lamarck, giraffes were like horses. They only had a small neck and forelimbs. They lived in places where surface vegetation as very poor. So, they had to stretch their necks in order to gain food from long trees. Hence, they acquired long necks.