Animal Life Cycles
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Transcript of Animal Life Cycles
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7-14-10 9-18-10 11-1-11
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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..
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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
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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)
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Eggbeginning
of life
LarvaGrowth and
Development
CaterpillarGrowth and DevelopmentPupa
Growth and Development
AdultReproduction
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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)
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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
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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.
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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.
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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.