Sexual reproduction leads to genetic variation because the sperm and egg that are produced contain different combination of genes than the parent organisms. sexual reproduction involves meiosis which is in the process of a cell doubling its DNA.
Well it deepends on how deep you are and what kinds of fossils you find. Like you would find fish, coral, sandallor fossils.
Eschecharia coli "E.Coli" is Bacterian strain which can survive within Digestive System of Human Body
It may also Cause Infection in your <Human> Gutt
False unlike the outer core the inner core is made out of mostly solid because it contains iron
