Positive selection may refer to:
- Positive selection as an event during thymocyte maturation
- Directional selection, a particular mode or mechanism of natural selection.
Famous quotes containing the words positive and/or selection:
“Men just don’t “get” that the reason to become involved is for ourselves. Doing more with our children won’t simply make women happier or keep them “off our backs,” but will create a deeper, more positive connection with the kids.”
—Ron Taffel (20th century)
“The books for young people say a great deal about the selection of Friends; it is because they really have nothing to say about Friends. They mean associates and confidants merely.”
—Henry David Thoreau (1817–1862)