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Complete and Incomplete Metamorphosis. Let’s look at the difference!. What is metamorphosis?. Metamorphosis refers to the way that certain organisms develop, grow, and change form. Metamorphosis actually means "change". . Two Types of Metamorphosis.

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Complete and incomplete metamorphosis l.jpg

Complete and Incomplete Metamorphosis

Let’s look at the difference!


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What is metamorphosis?

  • Metamorphosis refers to the way that certain organisms develop, grow, and change form.

  • Metamorphosis actually means "change".


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Two Types of Metamorphosis

  • INCOMPLETE METAMORPHOSIS - has THREE stages

  • COMPLETE METAMORPHOSIS -

    has FOUR stages.


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INCOMPLETE METAMORPHOSIS

Let’s take a closer look

at each stage!


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3 STAGES OFINCOMPLETE METAMORPHOSIS

  • Egg

  • Nymph

  • Adult


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  • EGG

  • A female insect lays eggs. These eggs are often covered by an egg case which protects the eggs and holds them together.


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  • NYMPH

  • The eggs hatch into nymphs.

  • Nymphs looks like small adults, but usually don't have wings.

  • Insect nymphs eat the same food that the adult insect eats.

  • Nymphs shed or molt their exoskeletons (outer casings made up of a hard substance called chitin) and replace them with larger ones several times as they grow.

  • Most nymphs molt 4-8 times.


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  • ADULT

  • The insects stop molting when they reach their adult size. By this time, they have also grown wings.


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COMPLETE METAMORPHOSIS

Let’s take a closer look

at each stage!


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4 STAGES OFCOMPLETE METAMORPHOSIS

  • Egg

  • Larva

  • Pupa

  • Adult


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  • EGG

  • The female lays eggs.


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  • LARVA

  • Larva hatch from the eggs. They do not look like adult insects. They usually have a worm-like shape.

  • Caterpillars, maggots, and grubs are all just the larval stages of insects. Larvae molt their skin several times and they grow slightly larger.


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  • PUPA

  • Larva make cocoons around themselves.

  • Larva don't eat while they're inside their cocoons.

  • Their bodies develop into an adult shape with wings, legs, internal organs, etc.

  • This change takes anywhere from 4 days to many months.


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  • ADULT

  • Inside the cocoon, the larvae change into adults. After a period of time, the adult breaks out of the cocoon.


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WHAT ABOUT FROGS?

  • Frogs undergo a different type of COMPLETE METAMORPHOSIS.

  • From the egg emerges a tadpole, which lives in the water, breathes with gills, and has a tail.

  • As the tadpole grows, lungs and legs form, and the gills and tail are absorbed into the body.

  • Finally, the animal leaves the water and lives mainly on land, as a frog.


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Let’s see what we know!

Let’s take Professor

Know-It-All’s Quiz

and see what we have

learned!


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QUESTION #1

  • What are the two types of metamorphosis?

  • Complete

  • Incomplete


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QUESTION #2

  • How many stages are there in incomplete metamorphosis?

    Answer: 3


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QUESTION #3

  • Name the stages of incomplete metamorphosis?

  • Egg

  • Nymph

  • Adult


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QUESTION #4

  • How many stages are there in complete metamorphosis?

    Answer: 4


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QUESTION #5

- Name the stages in complete metamorphosis.

  • Egg

  • Larva

  • Pupa

  • Adult


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QUESTION #6

Identify the cycle as complete or incomplete metamorphosis.


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QUESTION #7

Identify the cycle as complete or incomplete metamorphosis.


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QUESTION #8

D

E

C

F

B

A

Identify each stage of the complete metamorphosis of the butterfly.


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QUESTION #9

Identify the lifecycle of the frog as complete or incomplete metamorphosis.


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YOU’VE JUST COMPLETEDPROFESSOR KNOW-IT-ALL’S QUIZ

How did

you do?