1. Animal Life Cycles

2. Life Cycles General Life Cycle: Beginning of life
Growth and Development
Reproduction
Death
***Through reproduction, the cycle can begin again.
***Death can happen at anytime.

3. Complete Metamorphosis
In complete metamorphosis, the young DOES NOT resemble the adult.
Metamorphosis- A process of changes in form during an animal’s development
Most insects go through complete metamorphosis.
Complete Metamorphosis Insects:
butterflies, silkworms, mealworms, ladybugs

4. Complete Metamorphosis
ELPA will help ya remember complete metamorphosis: 1. Egg (laid by female animal) 2. Larva (worm-like, doesn’t resemble adult) 3. Pupa (the body changes form here) 4. Adult (fully-grown animal)

5. Butterfly Life Cycle Egg Larva Adult Caterpillar Pupa beginning
of life
Larva
Growth and
Development
Adult
Reproduction
Caterpillar
Growth and Development
Pupa
Growth and Development

6. What About Frogs?
Frogs also go through complete metamorphosis, but it’s different from ELPA.
Frog life cycle stages:
Egg
Tadpole (lives in water, breathes with gills)
Legs and lungs develop, tail and gills absorbed into body
Adult Frog (lives on land)

8. Incomplete Metamorphosis
A few insects (about 10%) go through incomplete metamorphosis.
In this type of life cycle, the young resembles the adult.
Incomplete Metamorphosis Insects:
crickets, grasshoppers

9. Incomplete Metamorphosis
Incomplete Metamorphosis stages
Egg (beginning of life)
Nymph (growth and development)
Adult (reproduction can happen)
***Death can happen anytime.
Think ENA, ELPA’s cousin.

10. Complete or Incomplete?
Complete Metamorphosis
Incomplete Metamorphosis
BIG CHANGE!!!!!!
The young DOES NOT resemble the adult.
The young looks like a worm.
About 90% of insects.
4 stages (egg, larva, pupa, adult)
Insects change during pupa stage.
NOT SO BIG CHANGE!!!!
The young DOES resemble the adult.
The young looks like the adult, except it doesn’t have wings.
Only about 10% of insects.
3 stages (egg, nymph, adult)
Insects change by molting, or shedding exoskeleton.

11. What About Everybody Else?
All animals follow the general life cycle pattern.
Reptiles, birds, and fish begin the life cycle as an egg.
Mammals begin the life cycle with live birth.