Question

What's are merit s in lamarkism?

Answer 1

Lamarkism consists two theories which is proposed my jean baptist lamark..

(1)- Use and disuse of organs
(2)-Inheritance of acquire characters

Law of use and disuse. In every animal which has not passed the limit of its development, a more frequent and continuous use of any organ gradually strengthens, develops and enlarges that organ, and gives it a power proportional to the length of time it has been so used; while the permanent disuse of any organ imperceptibly weakens and deteriorates it, and progressively diminishes its functional capacity, until it finally disappears.Inheritance of acquired traits. All the acquisitions or losses wrought by nature on individuals, through the influence of the environment in which their race has long been placed, and hence through the influence of the predominant use or permanent disuse of any organ; all these are preserved by reproduction to the new individuals which arise, provided that the acquired modifications are common to both sexes, or at least to the individuals which produce the young.

Examples of Lamarckism would include:

Giraffes stretching their necks to reach leaves high in trees strengthen and gradually lengthen their necks. These giraffes have offspring with slightly longer necks (also known as "soft inheritance").A blacksmith, through his work, strengthens the muscles in his arms. His sons will have similar muscular development when they mature.