Can you answer me about Lamark rules???

Question

I don't know about Lamark rules so, I wan't you to explain me about Lamark giraffe. Thanks

Answer 1

Lamarck developed two laws:

1. 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.

2. 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.


Giraffes stretching their necks to reach leaves high in trees (especially Acacias), strengthen and gradually lengthen their necks. These giraffes have offspring with slightly longer necks (also known as "soft inheritance").

Answer 2

reasons for changing and improving Lamark named needs and habits evoliutioning.a live creature tries to improve because of changes of his surroundings.finally abilities and specific features of one animal are being strained.
long neck of a giraffe developed because her ancestors had to strech their necks to reach leeves of trees.for necessity to improve and constant streching neck became longer. progeny inherited that actions consequence.