You're forgetting copying errors, which also contribute to genetic drift. Mutation alone would be sufficient given enough time, and the Earth has been around for 4 billion years...
its not me its somebody else he is a humanist and I keep telling him these things but I does not want to hear it. So Im not going to bother anymore
I'll give you an example of mutation...do you know what our lower jaws used to be? I'll tell you what they were...they were ancient geals...you know those that fishes use to breathe underwater.
Look at my prantes. And my grandparents. I am similar to them, but not exactly the same. I wonder what that means...
reply it's not correct to say "humans evolve from amoebas." Evolutionary theory hypothesizes that all life on earth has common ancestry, i.e. that humans and amoebas share a common ancestor. There's lots of evidence for this. all species have different genome sizes and this is not due to mutation alone. there are/is gene duplications, slippage, unequal crossing over and other replicating mistakes, plus chromosomal unequal distribution during meiosis. however, some genes are virtually identical from bacteria to humans. these are the genes that don't tolerate mutational changes. This is some evidence of common ancestry.
he meant gills. Gill arches fused at the base with the agnathan like jawless mouth to make a jaw. Another part separated to make part of the ear. This becomes evident when looking at a vertibrate fetus.
