The cleidoic egg is an adaptation to:

The author of "Philosophie Zoologique" is:

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

The idea of use and disuse of organs was given by

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

Name of the ship in which Charles Darwin went for his expedition.