7-14-10 9-18-10 11-1-11

General General Life CycleLife Cycle::1.1. BeginningBeginning of life of life2.2. Growth and Growth and DevelopmentDevelopment3.3. ReproductionReproduction4.4. DeathDeath***Through ***Through reproductionreproduction, the cycle , the cycle

can begin again.can begin again.***Death can happen at ***Death can happen at anytimeanytime..

In complete metamorphosis, the young In complete metamorphosis, the young DOES NOT DOES NOT resemble the adult.resemble the adult.

MetamorphosisMetamorphosis- A process of changes - A process of changes in form during an animal’s developmentin form during an animal’s development

MostMost insects go through complete insects go through complete metamorphosis.metamorphosis.

Complete Metamorphosis Insects:Complete Metamorphosis Insects:◦butterflies, silkworms, mealworms, butterflies, silkworms, mealworms, ladybugsladybugs

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)

Eggbeginning

of life

LarvaGrowth and

Development

CaterpillarGrowth and DevelopmentPupa

Growth and Development

AdultReproduction

Frogs also go through complete metamorphosis, but it’s different from ELPA.

Frog life cycle stages:1. Egg2. Tadpole (lives in water, breathes

with gills)3. Legs and lungs develop, tail and

gills absorbed into body4. Adult Frog (lives on land)

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

Incomplete Metamorphosis stages1.Egg (beginning of life)2.Nymph (growth and development)

3.Adult (reproduction can happen)***Death can happen anytime.Think ENA, ELPA’s cousin.

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.

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.