Another focus of zebrafish research is to understand how a gene called Hedgehog, a biological signal that underlies a number of human cancers, controls cell growth.

This interference can obscure the biological signals, making them very hard to measure.

Health depends on knowing how to read these biological signals: this smells spoiled; this looks ripe; that's one good-looking cow.

Computers in the processing of biological signals.

Signals of interest include sound, images, biological signals such as ECG, radar signals, and many others.

First, biological signals known as angiogenic growth factors activate receptors present on endothelial cells present in pre-existing blood vessels.

These networks control which genes are expressed in the cell in response to biological signals.

Responsible diets do not "teach people to ignore the natural biological signals of hunger and satiety."

Diets teach people to ignore the natural biological signals of hunger and satiety.

Second, the vast majority of genes are expressed at low levels, as depicted in Figure 3, where biological signals may become indistinguishable from noise.