You are interested in studying a receptor and decide to make a knockout mouse. However, you notice severe developmental defects that result in embryonic lethality in the receptor knockout mice. Which developmental process is most likely affected if the receptor is on the cell surface, and the knockout disrupts its ability to receive a signal and initiate a transduction pathway? a. cell movement
b. cell proliferation
c. induction
d. cell differentiation
e. apoptosis