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→Life cycles
==Life cycles==
==Life cycles==
*Most adult female insects are '''oviparous'''
**Lay eggs which hatch after deposition
*Some adult female insects are '''viviparous'''
**Lay larvae or nymphs
**Eggs rupture in female reproductive tract
===Simple Metamorphosis===
*Hemimetabolous
*Nymph emerges from the egg which resembles the adult but is '''sexually immature'''
*Nymph grows and undergoes several ecdyses (moults)
*Nymph becomes an adult (imago)
*E.g. Lice
===Complex Metamorphosis===
*Holometabolous
*Larva emerges from the egg and does not resemble the adult
*Larva feeds, grows and undergoes several ecdyses
*Larvae undergoes a quiescent stage where the outer cuticle hardens to form a pupa
**Some species have a silken cocoon
*Adult develops inside the pupal case before emerging
*E.g. Fleas and dipteran flies
Fleas
Fleas