In a 32-cell stage tunicate embryo,if the vegetal marginal cells lack a functional FGF receptor,the development of which of the following structures would be affected?
A)the notochord and mesenchyme
B)the underlying endoderm
C)the overlying ectoderm
D)muscle cells

Question

Quizplus · Accepted Answer

FGF (fibroblast growth factor) signaling is critical for the specification and differentiation of the notochord and mesenchyme in tunicate embryos. If the vegetal marginal cells lack a functional FGF receptor, this signaling pathway would be disrupted, leading to defects in the development of these structures. The underlying endoderm, overlying ectoderm, and muscle cells are not directly dependent on FGF signaling for their development in tunicate embryos.

In a 32-Cell Stage Tunicate Embryo,if the Vegetal Marginal Cells