Term
| 2 phyla important to deuterostomes |
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Definition
| echinodermata and chordata |
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Term
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Definition
| urochordata [tunicates], cephalochordata[lancelets], vertebrata[fishes - mammals] |
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Term
| examples of echinodermata |
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Definition
| sea lilies, sea urchins, brittle stars, sea stars, sea cucumbers |
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Term
| high concentration of transcription factor protein |
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Definition
| determines head/body polarity |
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Term
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Definition
| produce transcription factors that roughly define segmentation |
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Term
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Definition
produce transcription factors
that determine what develops in each of the body
segments |
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Term
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Definition
| different segments of developing embryo, toolkit is responsible for each metamere |
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Term
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Definition
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Term
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Definition
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Term
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Definition
| larval form has chordate characteristics which are lost in the adult form |
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Term
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Definition
| forms the vertebral column |
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Term
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Definition
| masses of mesoderm distributed along two sides of neural tube - eventually becomes dermis, skeletal muscle, and vertebrae |
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Term
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Definition
| formed by both mesderm and neural crest |
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Term
| visceral skeleton [derived from neural crest cells] |
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Definition
| supports gills in primitive vertebrates [jawless] -- first 2 elements evolved to form the vetebrate jaw |
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Term
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Definition
have five external gill slits supported by five visceral
arches. The two most anterior visceral arches form the jaws. |
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Term
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Definition
| formed by neural crest [enamel from ectoderm, dentine from neural crest] |
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Term
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Definition
| switch that acts tobegin making proteins and tissues - neural crest tissues migrate and make contact with oral epithelium to activate tooh forming tool kit gene |
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Term
| dentine -primitive vs. modern |
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Definition
| showed same basic structure - enamel cap, basal layer, and pulp cavity for blood and nerves -- outer layer came into contact with environment and was sensitive [marked changes in salinity and temp] |
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