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12.27: Mammal Structure and Function - Biology

Does this mammal breathe like all other mammals?Essentially, yes it does. A whale is a mammal, so it has a pair of lungs, not gills like fish. As shown here, whales take oxygen out of the air, not out of water.Eating and Digesting FoodMaintaining a high metabolic rate takes a lot of energy. The energy must come from food.
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4.3: Representative Groups - Biology

Scientists have studied prokaryotes for centuries, but it wasn’t until 1966 that scientist Thomas Brock (1926–) discovered that certain bacteria can live in boiling water. This led many to wonder whether prokaryotes may also live in other extreme environments, such as at the bottom of the ocean, at high altitudes, or inside volcanoes, or even on other planets.
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