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Help Save &Exit; Submit Zoologists are confident that jaws of primitive vertebra

ID: 193140 • Letter: H

Question

Help Save &Exit; Submit Zoologists are confident that jaws of primitive vertebrates were derived from gill arch supports of jawless ancestors. Which of the following is an observation that supports this conclusion? Select all that apply Check All That Apply 3.33 points Gill arches and jaws of fsh have·simlar middle of upper and lower elements that are hinged in the elences Gill arches and jaws have the same embryological origin-from neural crest. Jew musculature is homologous to gill arch musculature Molecular biological studies explain how loss of activity of the Hol 6 gene-the-tena head regon provides genetic explanation of how gill arch supports were transformed into jaw supports

Explanation / Answer

Ans. Gills arches and jaws arises from the same embryological origin from neural crest. These offer attachment to respiratory muscles.