Difference between revisions of "Insect Life Cycles"

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*Most adult female insects are '''oviparous'''
+
Most adult female insects are '''oviparous''', meaning they lay eggs which hatch after deposition
**Lay eggs which hatch after deposition
 
  
*Some adult female insects are '''viviparous'''
+
Some adult female insects are '''viviparous''', they lay larvae or nymphs, and the eggs rupture in female reproductive tract
**Lay larvae or nymphs
 
**Eggs rupture in female reproductive tract
 
  
 
===Simple Metamorphosis===
 
===Simple Metamorphosis===
  
*Hemimetabolous
+
Hemimetabolous; nymphs emerge from the eggs which resemble the adult but are '''sexually immature'''. The nymph grows and undergoes several ecdyses, also known as moults. The nymphs becomes adults.
 
 
*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===
 
===Complex Metamorphosis===
  
*Holometabolous
+
Holometabolous; larva emerge from the eggs and do not resemble the adults.  The larva feed, grow and undergoes several ecdysesLarvae undergoes a quiescent stage where the outer cuticle hardens to form a pupa, some species have a silken cocoon.  The adult develops inside the pupal case before emerging e.g. Fleas and dipteran flies[[Category:Insecta]]
 
 
*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[[Category:Insecta]]
 
 
[[Category:To_Do_-_Max]]
 
[[Category:To_Do_-_Max]]

Revision as of 18:37, 27 July 2010

Most adult female insects are oviparous, meaning they lay eggs which hatch after deposition

Some adult female insects are viviparous, they lay larvae or nymphs, and the eggs rupture in female reproductive tract

Simple Metamorphosis

Hemimetabolous; nymphs emerge from the eggs which resemble the adult but are sexually immature. The nymph grows and undergoes several ecdyses, also known as moults. The nymphs becomes adults.

Complex Metamorphosis

Holometabolous; larva emerge from the eggs and do not resemble the adults. The larva feed, grow and undergoes several ecdyses. Larvae undergoes a quiescent stage where the outer cuticle hardens to form a pupa, some species have a silken cocoon. The adult develops inside the pupal case before emerging e.g. Fleas and dipteran flies