How do organisms detect changes in their environment, and how do scientists and their instruments detect changes in experimental conditions, such as: How does a photoreceptor detect the presence of a photon? How does a doctor detect the presence of a tumor? How does a cell detect the presence of a chemical, such as a morphogen, a chemoattractant, or a nutrient?

Researchers should cite this work as follows:

• Ed Bartlett (2012), "Listen! Do you smell something? Signal Detection Theory in Biology," https://stemedhub.org/resources/829.

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1. life science
2. statistics