metamorphosis- a change in form from one stage to the next of an insect larva-worm like stage of...
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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
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CABBAGE WHITE BUTTERFLY
Lesson 6 Notes
SCIENTIFIC NAME: Pieris rapae
1. INCOMPLETE METAMORPHOSIS 3 stages
2. COMPLETE METAMORPHOSIS 4 stages
Two Types of Metamorphosis
Egg
Nymph
Adult
3 STAGES OF- INCOMPLETE METAMORPHOSIS
EGG
A female insect lays eggs
Eggs are often covered by an egg case which protects and holds them together
NYMPH
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.
EggLarvaPupaAdult
4 STAGES OF- COMPLETE METAMORPHOSIS
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
PUPA Larva make cocoons around themselves.
Don't eat while inside their cocoons
Also known as Chrysalis
Dormant during pupa stage
Their bodies develop into an adult shape with wings, legs, internal organs, etc.
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.
I. Life Cycle
A. Process called Metamorphisisi. a profound change in form from one stage to
the next in the life history of an organismii. Temperature effects how quickly
metamorphosis occurs
B. Egg Larva Pupa Adulti. Pupal Stage also known as Chrysalisii. Dormant during pupal stage
A. L1-L5 B. Determined by taking head measurementC. Eats Mustard Family (EX: WFP)D. Molts 2-3 times in first week of hatchingE. L1
i. Larva chews way out of eggii. Head grows slowly as body grows large
F. L2-L5i. L4&L5: Most eating occurs here
II. Larval Stages (Instars)
EGG LARVA
LARVA
EMERGING PUPA
A. 3 part bodyi. Head, thorax, abdomen
B. Proboscis: mouth; take in water and nutrients i. Length varies between species and types of
flowers that are their primary food source
C. Antennae: sensory structure to find foodD. Hair-like structures: sense of tasteE. Claws: to cling to surfacesF. Scales: pigment and insulationG. Spiracles: Facilitate gas exchange
III. Adult Anatomy
A. Sexual Reproduction i. Requires male and female parent
B. Males: i. 1 black spot on inner wing
C. Females:i. 2 black sposts on inner wingii. Abdomen larger than males to hold eggs
IV. Gender Differentiation
A. Silk glands in headi. Used to attach to surfaces
B. Frass: wastei. Used as fertilizer
C. Open Circulatory SystemD. Floral nectar primary food sourceE. Exoskeleton color due to amount of
sunlight CWB is exposed to
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
CWB Facts Continued
Let’s take ProfessorKnow-It-All’s Quizand see what we havelearned!
Let’s see what we know!
What are the two types of metamorphosis?
1. Complete2. Incomplete
QUESTION #1
How many stages are there in incomplete metamorphosis?
Answer: 3
QUESTION #2
Name the stages of incomplete metamorphosis?
1. Egg2. Nymph3. Adult
QUESTION #3
How many stages are there in complete metamorphosis?
Answer: 4
QUESTION #4
- Name the stages in complete metamorphosis.
1. Egg2. Larva3. Pupa4. Adult
QUESTION #5
QUESTION #6
Identify the cycle as complete or incomplete metamorphosis.
QUESTION #7
Identify the cycle as complete or incomplete metamorphosis.
QUESTION #8
Identify each stage of the complete metamorphosis of the butterfly.
AB
C
D
E
F
QUESTION #9
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
Remember…
Mosquito
Mealworm
Housefly
Mountain pine beetle
Grasshopper
Ladybug
Bed bug
Flea
Butterfly