The changes have been found to be made up of two sets of processes: histolysis, by which the whole or part of a structure disappears: and histogenesis, or the formation of the new structure. [Please select]
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The process of tissue-destruction is known as 'histolysis'; the rebuilding process is called 'histogenesis.' [Please select]
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The last larval cuticle, instead of being as usual worked off and cast, after separation from the underlying structures, becomes hard and firm, forming a protective case (_puparium_) within which by the processes of histolysis and histogenesis already described the organs of the pupa and imago are built up. [Please select]