embryo?
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3
1. Ectoderm
2. Endoderm
3. Mesoderm
Psuedocoelomates
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Possess a psuedocoelom that is derived from two germ
layers; those being the mesoderm and the endoderm
, Protostome development uses the splitting of ________ masses to form the coelom
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mesoderm
Ecdysozoa
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invertebrates that shed their exoskeleton through process called ecdysis
R1- What is true of modern animal phylogenies
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they are hypothetical
Ectoderm