昆虫的多态现象(polymorphism)是指某种昆虫的不同个体在胚后发育过程中显现出不同的形态类型的现象。形态的分化往往导致职能的分化,因此,同一昆虫群体中的个体在形态和职能上的分化就形成了不同的品级(caste)。各品级的分工合作与相互制约,维持了群体的存活与发展。昆虫的一生从卵经幼虫期(有些昆虫还有蛹期)到成虫期,要经过不断的生长一蜕皮过程,这就是昆虫的变态现象。白蚁的品 Polymorphism in insects refers to the phenomenon in which different individuals of an insect show different morphological types during post-embryonic development. Morphological differentiation often leads to the differentiation of functions. Therefore, individuals in the same insect population form different caste in their morphological and functional differentiation. The division of labor between the various levels of cooperation and mutual restraint, to maintain the survival and development of groups. Insect life from egg larvae (some insects and pupal stage) to adult stage, to go through a continuous process of molting, which is the insect metamorphosis. Termite products