Growth & Metamorphosis

Growth & Metamorphosis
- Growth
  - (irreversible) increase in organism size
  - molting required - exoskeleton shed
  - instar - larval stage between molts (5-7 is common)
- Metamorphosis
  - None
    - primitive
    - nymph look exactly like adult (except size)
    - utilize same habitat & food
    - e.g. silverfish
  - Simple
    - 3 life stages: egg - nymph - adult
    - Gradual
      - nymph looks similar to adult (except size & wings)
      - utilize same habitat & food
      - e.g. grasshoppers
    - Incomplete
      - aquatic nymph = naiad
      - adult is land/air based
      - larva & adult utilize diff. habitat & food
      - e.g. mayflies
  - Complete
    - 4 stages (not 3)
      - egg
      - larva
      - pupa (chrysalis)
      - adult
    - larva & adult utilize diff. habitat & food
    - e.g. ants