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This volume discusses recent advances in research regarding the evolution of specific and nonspecific defense responses in a taxonomically diverse array of species. Topics regarding invertebrates include the protective mechanisms (cellular and molecular) employed by insects, the protective roles of lectins, and the self-nonself discrimination revealed by tissue incompatibility reactions. With vertebrates, the evolution of the immunoglobulin-related superfamily of recognition molecules (including immunoglobulins and the major histocompatibility complex molecules) is examined over several...

Man has but a moment's gasp of air before he is transformed into something that requires no breath. Therefore, let man breathe and let man sigh, and let man speak and let man sing, but do not let man be heard, lest he forget that the air is not all his.