In 1987, a group of molecular geneticists at the University of California at Berkeley offered support for the idea that anatomically modern humans arose fairly recently in Africa, then spread out and colonized the world. The geneticists analyzed genetic samples of 147 women whose ancestors came from Africa, Europe, the Middle East, Asia, New Guinea, and Australia. By estimating the number of mutations that had taken place in the mitochondrial DNA (mtDNA) of each of these samples, the researchers concluded that
they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b
answer; endoplasmic reticulum;
i took a test for bio that had this question and these were the correct answers, not sure if this is any now lol
the nervous system and the muscular system work together.
sweat reaches the surface of the skin and evaporates into the air.
muscles underneath the skin relax, causing hair on the skin to lay flat.