The Evolution of Vertebrates
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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Metazoa | Organisms with body cavities; Allows further body system complexity; Gave rise to Protostomata and Deuterostomata
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Metazoa: Three Embryonic Stages | Ectoderm, mesoderm, endoderm.
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Protostomata | Rose from Metazoa; Mouth is the first opening formed in embryo
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Deuterostomata | Rose from Metazoa; Anus is the first opening formed in the embryo; grave rise to Chordata
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Chordata | Rose from Deuterostomata; dorsal, hollow nerve chord, notochord, post anal tail, endostyle, and sessile feeders; filter feeders, low energy
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Vertebrata | Rose from Chordata; 3 part brain; Gills; Pharyx; Complex internal organs; Vertebrae; Complex sensory organs; Extracellular digestion; Hox genes
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