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Cetaceans And Evolution
Part 1 of Paper
....ence is uncertain, but there have been many theories. Some say that dolphins are aquatic forms of goats, and others believe they evolved just like everything else, from a single cell, and
not from an actual multi-cellular being. Because most cetaceans have some vestigial structures such as under-developed os coxae, t.... Part 2 of Paper
....A cetacean’s skin is free of sweat glands, oil glands, or hair, and feels much like smooth, wet rubber to the touch.
Cetaceans, like other mammals, have lungs. They breathe air through a single nostril, or pair of nostrils, located on the top of the head; but contrary to a popular image, they do not “spout” water when they exhale. The visible spout, the size and shape of which is unique to many species, is simply water vapor in the lungs and a small amount of water present in the depress.... |
| Number of words: 794 - Approximate pages: 3 |
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