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Animal Life Cycles

Animal Life Cycles. 7-14-10. 9-18-10. 11-1-11. 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. Complete Metamorphosis.

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Animal Life Cycles

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  1. Animal Life Cycles 7-14-10 9-18-10 11-1-11

  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 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)

  7. 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

  8. 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.

  9. Complete or Incomplete? • 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. Complete Metamorphosis Incomplete Metamorphosis

  10. 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.

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