Your Answer:
that sex should only be engaged in for procreative purposes
The degeneracy theory was proposed by George G. Simpson in 1944. Simpson suggested that evolution could lead to the retention of non-functional traits or "degenerate" characteristics in a species.
Karl Marx proposed the theory of communism.
the 69 theory LOL
1905
To propose a Theory and to make a Theory into a Law
when he died :P
Charles Darwin. His theory is The Theory of Natarual Seletion. A theory that has been proved even today
Darwin .
Yes
The phlogiston theory was first proposed by Johann Joachim Becher in 1667. This theory is now considered obsolete and was replaced by the oxygen theory.
Schleiden and Schwann
no that is the germ theory.