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

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 【站僕】摩檸Morning：有沒有達人來解釋一下?
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34. The most ancient branch point in ani..-阿摩線上測驗