But the cell must already have an internal system which can respond to such signals and again the signal is being selective.

It favors those groups that respond to given signals in the environment.

The researchers have yet to determine why human fertility rates respond to seasonal signals.

Did the agency fail to respond to signals from other agencies that there was renewed trouble?

Other genes must respond instantly to signals arriving from the outside environment.

Braggarts can help themselves by working on responding to signals that other people use, looking and listening.

The toy was actually a sort of light gun that responded to signals from the television playing the tape.

Again, military officials said, it was a case of the driver's not responding to signals to slow down.

The guards on that part of the perimeter aren't responding to signals.

Does it matter whether stocks respond sensibly to economic signals?