Question

How does use and disuse of an organ help in evolution of a new species?

Answer 1

The identification of Lamarckism with the inheritance of acquired characteristics is regarded by evolutionary biologists including Michael Ghiselin as a falsified artifact of the subsequent history of evolutionary thought, repeated in textbooks without analysis.[15]American paleontologist and historian of science Stephen Jay Gould wrote that in the late 19th century, evolutionists "re-read Lamarck, cast aside the guts of it ... and elevated one aspect of the mechanics—inheritance of acquired characters—to a central focus it never had for Lamarck himself."[16] He argued that "the restriction of 'Lamarckism' to this relatively small and non-distinctive corner of Lamarck's thought must be labelled as more than a misnomer, and truly a discredit to the memory of a man and his much more comprehensive system."[17]Gould advocated defining "Lamarckism" more broadly, in line with Lamarck's overall evolutionary theory.

Answer 2

Answer:
According to Lamarck, those organs which are used regularly become strong and more developed. On the other hand, those organs which are not used regularly become weak and degenerate. Such characters are inherited to the offsprings and so on. In the due course of time, such characters become permanent in later generations and become quite different from their ancestors, resulting in the formation of a new species..

I hope it help you..
Please mark me brainlist