The Cambrian explosion was a period at the Pre-Cambrian boundary of the geologic time scale at 542 Ma. At this boundary, the fossil record shows that animals suddenly appeared in a dramatic radiation of life. A radiation is the relatively rapid development of new types of organisms that derive from a common ancestor. The Cambrian explosion is important because it marks the origination of all major animal groups called phyla.
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C. Large supermarket chains can negotiate prices because they have such a strong presence in the agricultural community. Im sorry no one answers these
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55 degrees as an acute angle
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