Positive Selection

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:

    Our role is to support anything positive in black life and destroy anything negative that touches it. You have no other reason for being. I don’t understand art for art’s sake. Art is the guts of the people.
    Elma Lewis (b. 1921)

    Every writer is necessarily a critic—that is, each sentence is a skeleton accompanied by enormous activity of rejection; and each selection is governed by general principles concerning truth, force, beauty, and so on.... The critic that is in every fabulist is like the iceberg—nine-tenths of him is under water.
    Thornton Wilder (1897–1975)