During Gastrulation in Frog Embryos, Fibronectin

Multiple Choice

During gastrulation in frog embryos, fibronectin

A) provides an extracellular anchorage for migrating cells.
B) regulates actin-myosin interactions in the cytosol of migrating cells.
C) reduces the entry of calcium ions into migrating cells.
D) regulates mRNA movement out of the nucleus of a moving cell.
E) provides the pigment that accumulates in the primitive streak.