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:
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