Which scientist(s) determined the 3D shape of the DNA molecule.

the animal that would be cutest if scaled down to the size of a cat? elephant

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

the fossil record provides evidence of a common ancestor to many species.