sex is not classified as women and men sex. it is mutual relation between man and women. sex is not classified as women and men sex. it is mutual relation between man and women.

Charles Darwin is best known for his groundbreaking work "On the Origin of Species," published in 1859, which introduced the theory of evolution by natural selection. He also wrote other important works such as "The Descent of Man" and "The Voyage of the Beagle."

No, it's the other way around: descent with modification is what you need for natural selection to happen.

"The Descent of Man" was written by Charles Darwin, the British naturalist famously known for his contributions to the theory of evolution through natural selection. It was published in 1871 and expands on his theories outlined in his earlier work, "On the Origin of Species."