Other Animals Less Efficient
I) Not all animals move as efficiently as sharks and dolphins. Perhaps the greatest loser in locomotion efficiency is the slug. The slug, which looks like a snail without a shell, lays down a slimy trail over which it crawls. It uses so much energy producing the slimy mucus and crawling over it that a mouse traveling the same distance uses only one twelfth as much energy. Scientists say that because of the slugs inefficient use of energy, its lifestyle must be restricted. That is, the animals are forced to confine themselves to small areas for obtaining food and finding proper living conditions. Have humans ever been faced with this kind of problem?
1.According to the passage, a shark can use movement to find food, to avoid being chased by its enemies, and to find a new place to live.
2.Examples of automobiles, rockets and submarines are used to show that human inventions enable us to travel in almost any kind of environment.
3.The skin is the key to the sharks swift locomotion in water.
4.According to the Duke University scientists, when bending its body in swimming, the shark stretch its collagen fibers to the greatest extent.
5.Because it is also inflated by pressure, the area just under the sharks collagen fibers similar to a belted radial tire.
6.A laminar flow is formed when a fish swims slowly through the water.
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