Class 12 NEET Biology Evolution Questions Part 1

Lamarck gave theory of Lamarckism in which he explained inheritance of acquired characters which states that whatever an individual acquires characters in its life time due to internal vital force, effect of environment, new needs and use and disuse of organs, they are inherited to the next generations. The process continues. After several generations, the variations are accumulated upto such extent that they give rise to new species. This theory was proved wrong by August Weismann. Weismann cut off the tails of rats for as many as 22 generations and allowed them to breed, but tailless rats were never born.