Texas Tech University. The dog-like lizard gorgonopsid was one of the first ancient reptiles to flaunt long, saber-toothed canines. Human beings share 99.9% of their DNA with all other human beings. I believe that knowledge, even unpleasant knowledge, is far preferable to ignorance. The genome sequencing project has revealed that we humans have thirty to forty thousand genes. share Because of these similarities, scientists can investigate the physiology of mice to gain knowledge that will be valuable for medical research into how human beings grow, acquire diseases, and conduct other studies. The business part of the DNA, the part that carries genetic information, is the sequence of nucleotides, or bases, in the molecule. Because of this, their brains started to grow. It may not have been a scale., Left: ScienceDaily. While we've previously sequenced nearly two dozen mammalian genomes, reptiles - and lizards in particular - have remained largely ignored. The lizard also had a huge number of genes devoted to vision, which fits with their very strong vision - indeed, some of these anole lizards can see into the ultraviolet spectrum. In our mammalian ancestry an average base has changed, say from an A to a T, at the almost unbelievably slow rate of about one change per billion years. We cannot, of course, tailor-make a special environment for every individual, but we can continue to move in this direction. And I argue that we should strive not only for maximum personal satisfaction but for maximum contribution; each of us owes society the fruits of our special gifts. By the time the shrew-like tritheldonts appeared 230 million years ago, reptiles were chewing on plants and developing molar-like teeth. Humans and animals are similar in some ways, just like in DNA. The genome project is but one example. It could help scientists answer a wide variety of questions about other animals, such as when and how they evolved and the biological basis for some of their unusual
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