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Metamorphosis- a change in form from one
stage to the next of an insect
Larva-worm like stage of insects
Pupa-stage where insect turns from larva to
adult
Nymph- a young insect in stage where it
looks like a young adult
Chrysalis- another name for pupa stage
Molt- shed
Instars- larva stages
SCIENTIFIC NAME:
Pieris rapae
Lesson 6 Notes
1. INCOMPLETE METAMORPHOSIS
3 stages
2. COMPLETE METAMORPHOSIS
4 stages
 Egg
 Nymph
 Adult
 EGG
A
female insect lays eggs
 Eggs
are often covered by
an egg case which protects
and holds them together
 NYMPH
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Nymphs do look like small adults, but
usually don't have wings.
Nymphs molt (shed) their
exoskeletons and replace them with
larger ones several times as they grow
Most nymphs molt 4-8 times.
 ADULT
 Insects
stop molting when
they reach their adult size.
 By this time, they have also
grown wings.
 Egg
 Larva
 Pupa
 Adult
EGG
 The
female lays eggs
 Usually
found on the
undersurfaces of leaves.
 LARVA
Larva hatch from the eggs
 Do not look like adult insects.
 Worm-like shape.
 Larvae molt several times and grow
slightly larger.
 Caterpillars, maggots, and grubs
are all just the larval stages of
insects
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PUPA

Larva make cocoons around themselves.

Don't eat while inside their cocoons
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Also known as Chrysalis
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Dormant during pupa stage

Their bodies develop into an adult shape
with wings, legs, internal organs, etc.
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This change takes anywhere from 4 days
to many months.
ADULT
 Inside
the cocoon, the larvae
change into adults
 After
a period of time, the
adult breaks out of the
cocoon.
A.
Process called Metamorphisis
i.
ii.
B.
a profound change in form from one stage to the
next in the life history of an organism
Temperature effects how quickly metamorphosis
occurs
Egg  Larva  Pupa  Adult
i.
ii.
Pupal Stage also known as Chrysalis
Dormant during pupal stage
A.
B.
C.
D.
E.
L1-L5
Determined by taking head measurement
Eats Mustard Family (EX: WFP)
Molts 2-3 times in first week of hatching
L1
i.
ii.
F.
Larva chews way out of egg
Head grows slowly as body grows large
L2-L5
i.
L4&L5: Most eating occurs here
EGG  LARVA
LARVA
PUPA
EMERGING PUPA
ADULT
A.
B.
C.
D.
E.
F.
G.
3 part body
i.
Head, thorax, abdomen
i.
Length varies between species and types of
flowers that are their primary food source
Proboscis: mouth; take in water and
nutrients
Antennae: sensory structure to find food
Hair-like structures: sense of taste
Claws: to cling to surfaces
Scales: pigment and insulation
Spiracles: Facilitate gas exchange
A.
Sexual Reproduction
i.
B.
Males:
i.
C.
Requires male and female parent
1 black spot on inner wing
Females:
i.
ii.
2 black sposts on inner wing
Abdomen larger than males to hold eggs
A.
Silk glands in head
i.
B.
Frass: waste
i.
C.
D.
E.
Used to attach to surfaces
Used as fertilizer
Open Circulatory System
Floral nectar primary food source
Exoskeleton color due to amount of sunlight
CWB is exposed to
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Adults can emerge from pupa in 1
minute
Wings take 15 minutes to expand
Wings take 1-2 hours to harden so
they can fly
Let’s take Professor
Know-It-All’s Quiz
and see what we have
learned!
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1.
2.
What are the two types of
metamorphosis?
Complete
Incomplete
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How many stages are there
in incomplete
metamorphosis?
Answer: 3
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1.
2.
3.
Name the stages of incomplete
metamorphosis?
Egg
Nymph
Adult
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How many stages are there
in complete
metamorphosis?
Answer: 4
- Name the stages in complete
metamorphosis.
1.
2.
3.
4.
Egg
Larva
Pupa
Adult
Identify the cycle as complete or
incomplete metamorphosis.
Identify the cycle as complete or
incomplete metamorphosis.
D
E
C
F
B
A
Identify each stage of the complete
metamorphosis of the butterfly.
Identify the lifecycle of the frog as
complete or incomplete
metamorphosis.
Complete: The baby does not look like the
adult.
Incomplete: the baby looks like the adult