EVERYDAY SCIENCE

Detailed explanation-1: -Lamarck. s .. Theory of Acquired characters.. was disproved by August Weismann who conducted experiments on mice for twenty generations by cutting their tails and breeding them.

Detailed explanation-2: -Who challenged Lamarckism? August Weismann challenged Lamarckism with an experiment where he cut the tails of rats for 20 generations.

Detailed explanation-3: -Q. Weismann cut off the tails of mice generation after generation, but tails neither disappeared nor shortened, proving that acquired characters are not inherited.

Detailed explanation-4: -Answer and Explanation: Lamarck’s theory was rejected because no mechanism was proposed to explain how Lamarckian evolution would take place. The discovery of DNA gave Darwinian evolution a vehicle with which to take place, but Lamarck’s theory lacked such a vehicle.

Detailed explanation-5: -It is correct that evolution occurs over generations of reproduction, but Lamarck was incorrect in thinking that traits developed over a lifetime will be passed along to offspring. The correct mechanism of inheritance is that genes are passed along from generation to generation.