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Briefly describe the major geologic and biological changes that took place during the Paleozoic era.
contrast the animal life of the Paleozoic era with that of the early Cenozoic era.
why couldn't plants move onto land prior to the establishment of an ozone layer?
please help thanks in advance...!
contrast the animal life of the Paleozoic era with that of the early Cenozoic era.
why couldn't plants move onto land prior to the establishment of an ozone layer?
please help thanks in advance...!