IV. Compare the morphological differences among vertebrate embryos and vertebrat

Question

IV. Compare the morphological differences among vertebrate embryos and vertebrate adults Vertebrate Character Trait Variation Vertebrate Embryological Differences Vertebrate Adult Similarities Similarities Differences Between embryological vertebrates and adult vertebrates, which has relatively more similarities? Differences? a. b. Relate this answer to mutation and varia tion in embryologic al traits vs mutation and variation in adult traits. Is one more common than the other? Consider conservation of genes and what is necessary for an organism's evolutionary "success"

Explanation / Answer

presence of notochord

vertebrate embryological vertebrate adult similarities differences similarities differences

presence of notochord

notochord degenerates into vertebral discs presence of pharyngeal slit pharyngeal slit develop into gill arches in bony fish. pharyngeal slit develop into ear, jaw and nose in terrestrial animals presence of a hollow dorsal nerve chord hollow dorsal nerve chord develops into central nervous system i.e. brain and spine presence of tail and gill slits adult retains tail and gill slits gill slits present only in fishes. Lungs replaces gill slits in reptiles, amphibians and mammals.

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