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Biology 11 Online
OpenStudy (anonymous):

the difference between a protostome and a deuterostome is that a) a deuterostome only has two germ layers b) a protostome always develops into an acoelomate c) the blastopore in a deuterostome develops into the animals anus d) only protostomes can develop into radially symmetrical adults

OpenStudy (petiteme):

In deuterostomes, the first opening (the blastopore) becomes the anus.

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