Author Question: The most ancient branch point in animal phylogeny is that between having A) radi (Read 1012 times)

hummingbird

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The most ancient branch point in animal phylogeny is that between having
A) radial or bilateral symmetry.
B) a well-defined head or no head.
C) diploblastic or triploblastic embryos.
D) true tissues or no tissues.
E) a body cavity or no body cavity.



geoffrey

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