Unformatted text preview: protostomes in which the planes of cell division that transform the zygote into a ball of cells are diagonal to the vertical axis of the embryo. As a result, the cells of each tier sit in the grooves between cells of adjacent tiers. Triploblastic Possessing three germ layers: the endoderm, mesoderm, and ectoderm. Most eumetazoans are triploblastic....
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- Spring '10
- Developmental Biology, Germ layer, Embryo, vertical axis, radial symmetry symmetry