metamorphosis
Post on 13-Nov-2014
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Metamorphosis (a change in an animal’s form staring at birth or hatching.)
ObjectiveRecognize the difference between
complete and incomplete metamorphosis
Metamorphosis • A series of changes some animals go through as they
develop, in which the young start out looking nothing like the adults.
• Can you name an animal that goes through metamorphosis?
• Metamorphosis is broken down into two categories:
• Complete and Incomplete Metamorphosis.
• Complete Metamorphosis has four parts: egg, larva, pupa, and adult. Incomplete Metamorphosis only has three parts: egg, nymph, and adult.
Complete Metamorphosis • During complete metamorphosis an egg
hatches into a wormlike larva. It eats a lot and grows to become a pupa. This is the resting phase. Some larvae spin protective cocoons. Many body changes take place. Finally, the adult winged insect emerges. Below are a few insects that go through complete metamorphosis.
Incomplete Metamorphosis
• During Incomplete Metamorphosis the insect changes shape gradually. An egg hatches into a nymph that looks like a small adult without wings. The nymph grows and slowly changes. Finally, it grows wings and can lay eggs. This is when it is considered an adult. Below are a few creatures that go through Incomplete Metamorphosis.
Complete Metamorphosis • The chart below is an example of Complete
Metamorphosis. Notice how it drastically changes during its four stages. Each body change or stage never resembles the adult.
Incomplete Metamorphosis
• Notice the insect resembles the adult from the start.
Can you see the difference?
Review • Can you name the two types of
Metamorphosis? • How many stages does each type
have? Name them.• How are the two types of
Metamorphosis different?• Compare a nymph to a larva.
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