The cleidoic egg is an adaptation to:

Discuss the theory of the evolution of life forms.

Darwin's theory of Pangenesis shows similarity with the theory of inheritance of acquired characters. Which of the following is true regarding this?

$A$ scientist kept $69$ generations of Drosophila in the dark,yet the flies still had normal eyes. Which theory does this disprove?

What did $NOT$ happen when plant species migrated from water to land?

Who proposed the theory of use and disuse of organs?