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Unformatted text preview: whales, monkeys, and humans. These mammals have a placenta: a nutritive connection between the embryo and the mother's uterine wall. Embryos are attached to the placenta, and they complete their development within the mother's uterus. Mammals have spread to virtually all environments on earth ranging from the oceans to the deserts. They live underground, on the ground surface, in trees, and in the air. Mammals have a highly developed nervous system, and many have acute senses of smell, hearing, taste, vision, and touch. Mammals rely on memory and learning to guide their activities. They have been able to develop numerous appropriate responses to different environmental situations. They are considered the most successful animals on earth today....
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This note was uploaded on 11/11/2011 for the course BIO 101 taught by Professor Pesthy during the Fall '07 term at Texas State.
- Fall '07