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:
“Nurturing competence, the food of self-esteem, comes from acknowledging and appreciating the positive contributions your children make. By catching our kids doing things right, we bring out the good that is already there.”
—Stephanie Martson (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)