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OpenStudy (anonymous):
The higher invertebrates are divided into two evolutionary lines, protostomes and deuterostomes. This division is based on which developmental feature?
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OpenStudy (anonymous):
idk
OpenStudy (anonymous):
k thanks
OpenStudy (anonymous):
i believe it has somethiung to do with the mouth
OpenStudy (anonymous):
okay
OpenStudy (anonymous):
PROTO+STOMES= mouth develops 1st DEUTERO+STOMES=anus develops 1st
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