Growth, development, and function of insects. Topics include the integument, endocrine control of growth, development, metamorphosis and reproduction, polymorphism, diapause, circadian rhythms, biological clock, photoperiodism, nutrition, respiration, circulation, excretion, and function of neuromuscular system. Prerequisites: PLSOILIN 326 (formerly ENTOMOL 326), BIOCHEM 420 and 421.