Phylum Annelida includes earthworms, leeches, and marine worms. This is the first animal phylum to have where parts are separated by septa.
segmentation

coelomate

cephalization

locomotion

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human impact on the environment can be seen in the deterioration of the !

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carbon traps heat so more of it makes it hotter causing global warming. during the ice age carbon levels in the atmosphere were low so it got very cold. so the common things between them is carbon levels in the atmosphere.