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Biology 21 Online
OpenStudy (anonymous):

MEDAL!!!! Why are animals like mammals, reptiles birds, and fish all in the same phylum together even though they are so different? Research paper and idk what to say

OpenStudy (anonymous):

they're all chordates which mean they have a backbone... i put a picture so you can kinda see how they're categorized

OpenStudy (anonymous):

Thank you

OpenStudy (exoticinspirit):

vertebrates

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