When echinoderms move in a manner such as walking or crawling, they pump sea water through a series of internal body canals. The water is used to inflate some of the tube feet, causing them to expand. In many species, the tube feet are equipped with suc(k)ers that grip onto the sea floor.
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Genetic meaning:
A unit of heredity which is transferred from a parent to offspring and is held to determine some characteristic of the offspring.
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When new inventions arose, while many toxins have been around for centuries, the largest boom was the industrial revolution.