A) Darwin
B) Lamarck
C) de Vries
D) Hooker
Correct Answer: B
Solution :
The theory of use and disuse of organ was proposed by Jean Beptiste de Lamarck (1744-1829). Lamarcks evolutionary mechanism, inheritance of acquired characters, was engagingly simple; organism, by striving to meet the demands of their environments, acquired adaptations and pass them by heredity to their offsprings. According, to Larmarck, the giraffe evolved its long neck because its ancestor lengthened their necks by stinetching to obtain food and then passed the lengthened neck to their offspring. Over many generations, these changes accumulated to produce the long neck of the modem giraffe.
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