$A$ scientist who gave a theory very similar to that given by Darwin was

Who wrote the book 'Philosophie Zoologique',which was published in $1809$?

Weismann cut off the tails of mice for several generations. However,the tail did not disappear or become shorter,which shows that ...........

Darwin's theory of natural selection was based on which of the following?

Who among the following was of the strong opinion that acquired characteristics are inherited?

$A$ scientist kept $72$ generations of $Drosophila$ in darkness. Even after that,the first flies had normal eyes. This disapproves the theory of