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Problem: The most ancient branch point in animal phylogeny is that between havingA) radial o bilateral symmetryB) a well-defined head or no headC) diploblastic or triploblastic embryosD) true tissues or no tissuesE) a body cavity or no body cavity

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Phylogenetic Tree of Animals:

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Problem Details

The most ancient branch point in animal phylogeny is that between having

A) radial o 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

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What scientific concept do you need to know in order to solve this problem?

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Based on our data, we think this problem is relevant for Professor Guerra's class at RUTGERS.