Interbreeding between archaic and modern humans been shown that Neanderthal ancestry has been selected against in conserved biological pathways, such as RNA processing. Consistent with the hypothesis that purifying selection has reduced Neanderthal contribution in present-day modern human genomes, Upper Paleolithic Eurasian modern humans (such as the Tianyuan modern human) carry more Neanderthal DNA (about 4–5%) than present-day Eurasians modern humans (about 1–2%). Genes affecting keratin were found to have been introgressed from Neanderthals into modern humans (shown in East Asians and Europeans), suggesting that these genes gave a morphological adaptation in skin and hair to modern humans to cope with non-African environments. This is likewise
Is There a Doctor in the Mouse? right and eats the cake one layer at a time, then he takes the cherry on top. Tom sees this and mutters somewhat in the vein of, "Why, that mouse is very strong!" Afterwards, Tom sets up a mousetrap sandwich for Jerry. Jerry does take the bait, but doesn't trigger the trap. After Tom triggers the trap from attempting to bite Jerry, Tom yells in pain upside the light fixture! When Jerry takes a banana from the refrigerator, Tom grabs the banana and peels the skin, Jerry taunts him by kissing his nose then runs off. The effects of the