Bio & Biochem Quiz
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FOUNDATIONAL CONCEPT 2: CELLS AND CELLULAR ORGANIZATION
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In a zebrafish study of early embryogenesis, investigators label epiblast cells at the onset of gastrulation and track their position as the blastoderm undergoes epiboly and internal cell movements. Labeled cells that ingress through the dorsal lip of the blastopore later localize as a middle layer between an outer epithelial sheet and an inner gut tube. In histologic sections at neurulation, these labeled cells contribute to segmented blocks adjacent to the neural tube. Based on this experimental context, the labeled cells most likely originated from which germ layer during gastrulation?
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