Complete metamorphosis is a phenomenon by which a larva after moulting several times changes into an adult form. The life cycle of Musca includes four stages-egg, larva, pupa and adult. Pheretima is bisexual, having both male and female reproductive organs. Chameleon shows camouflage. Taeniadoes not show polymorphism. Related Theory In complete metamorphosis, larva after hatching, moults several times to become a fully grown one. It later becomes a pupa within a secreted case, called the puparium. Pupa differentiates into the young adult that breaks the puparium open and emerges outside. Then it grows to a mature form.