Lamarck theory helped in science, he had pictured the bodily characteristics, modified by an animal’s activities, as being passed on to future generations. Weismann showed that in animals the body which is the soma and germ cells are separate, that only the germ cells produce the next generation, and that, consequently, all such modifications in the higher animals have to be transmitted from the soma of one generation to its germ plasm and then on to the soma of the succeeding generation.
