Question

A scientist kept 72 generations of Drosophila in
darkness. Even after that the first flies had normal
eyes. This disapproves the theory of
(a) natural selection (b) acquired characters
(c) use and disuse (d) synthetic theory

Answer 1

Answer:

Lamarck is best known for his theory of Inheritance of acquired characteristics, first presented in 1801. It states that an organism can pass on characteristics that it has acquired through use or disuse during its lifetime to its offspring. If an organism changes during life in order to adapt to its environment, those changes are passed on to its offspring.

In this case, a scientist kept 72 generations of Drosophila in darkness. Even after that, the first flies had normal eyes. This means the change in environment did not impact the organism to develop a trait which can be inherited to its progeny. Hence it disapproves the theory of inheritance of acquired characters.

So, the correct answer is 'Inheritance of acquired characters'.

Answer 2

I think natural selection. ...