1. Reproduction Growth and Development
Insect Life Cycles
Reproduction
Growth and Development

2. Insect Reproduction Most  sexual In many species of wasps,
EXCEPTION: Males  scarce/around at certain times of year
Females still reproduce!
Common in aphids.
In many species of wasps,
unfertilized eggs = males
fertilized eggs = females
Certain species  females produce only females.
Insects may reproduce by:
laying eggs
the eggs hatch inside the female
Common in aphids

3. Insect Growth and Development (Complete Metamorphosis)
In most insects
Four stages: egg, larva or nymph, pupa, and adult
several larval or nymphal stages instars
Growth  larval or nymphal stages
The eggs, pupae, and mature adults don't grow in size

5. Pupa stage (cocoon or chrysalis):

6. Complete Metamorphosis

7. Insect Growth and Development (Incomplete Metamorphosis)
Nymph  look like the adult
No wings
color may be different
Nymphs and adults  usually occupy the same habitat
EXAMPLES: true bugs and grasshoppers

9. Incomplete metamorphosis

10. Ametabolous life cycle:
EXAMPLES: Springtails and silverfish
They have an egg stage
Once hatched = look exactly like the adult.
The nymphs 
Missing the sexual organs OR
Have them but are unable to reproduce until the adult stage