Dev Bio Short Quiz

Resulting structures of spirally cleaving embryos that typically has small or no blastocoel

Activates genes on different sides of snail embryos, depending on their coiling direction

Helps align the cytoskeleton and affects the direction of snail shell coiling

Resulting three-lobed structure in first cell division

Refers to a specific set of cells that are formed during the early stage of embryonic development in some invertebrate organisms

Every adult C. elegans has exactly________ cells, and scientists have figured out exactly how each of those cells arises from the original egg cell

Unique structure in the embryos of some mollusks and annelids and appears as a bulge in the cytoplasm right before the first cell division

Crucial for establishing polarity during early C. elegans development

RNA- binding protein that appears to inhibit the translation of pal-1

Crucial for establishing mesoderm placement and influence the development of other cell types of many spiralian species