The most plausible evidence that birds have evolved from dinosaurs is that the birds have the exact same bone structure as one of the dinosaur super-families, the <em>Saurischia. </em>In this group of dinosaurs we have the total same skeletal structure as in the birds, and most of the dinosaurs of this branch were bipedal, as are the birds, both flying and nonflying.
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Some types of bacteria can cause diseases in humans, such as cholera, diptheria, dysentery, bubonic plague, pneumonia, tuberculosis (TB), typhoid, and many more. If the human body is exposed to bacteria that the body does not recognize as helpful, the immune system will attack them. coccus, rod or bacillus, and spiral are the most common shapes of bacteria
