<span>One important mechanism of evolution, natural selection, </span>does<span> result in the evolution of improved abilities to survive and reproduce; however, this does not mean that evolution is progressive — for several reasons
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Anton van Leeuwenhoek :-))
It occurs at the metaphase of the cell division cycle.
Answer: Paleozoic
Explanation: The Paleozoic Era, which ran from about 542 million years ago to 251 million years ago, was a time of great change on Earth. The era began with the breakup of one supercontinent and the formation of another plants became widespread. And the first vertebrate animals colonized land.
