In yeast signal transduction, a yeast cell
A. produces signal molecules that change the cell itself, allowing it to interact with another cell.
B. must physically and directly interact with another yeast cell.
C. secretes molecules that result in responses by other yeast cells.
D. produces response molecules that diffuse to other yeast cells.
E. mates with another cell, after which the new cells secrete hybrid signals.
Answer: C