1.   A homeobox signal might tell a gene to make a BMP.

2.   A homeobox signal might tell a gene to make a B.M.P.

3.   A silent, prearranged signal tells Marty Murphy, the nurse at Mattahunt Elementary School, when a girl wants to use her private bathroom.

4.   Regardless of what they are used for, Chipcorders need a signal to tell them to start playing.

5.   That signal tells the microprocessor which key was just pressed, and it sends the information on to the rest of the computer.

6.   The resulting electrical signal tells the Chipcorder to play.

7.   The signals tell the bacteria that enough of them have gathered in one place to reach the critical density required for biofilm.

8.   The signals tell the engine how fast the vehicle is going, and the computer adjusts accordingly.

9.   The signals tell the small box which vial to heat.

10.   The signals tell her how the creatures survive the winter, and what humans can do to help them.