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What is evolution?
Transcript of What is evolution?
3. Thinking Cap!
Date Topic/Activity Page #
10.29.13 Natural Selection 47
Did you survive? _____ Why?
Which genes will be passed down to next generation (which wings)?
How will the next generation LOOK (size wings)?
Game Questions (3 min)
Natural Selection Game
What has happened?
Have you ever wondered why
Giraffes have long necks?
Natural selection kills off organisms that
cannot adapt to survive in the environment.
In the game we played,
only organisms that survived passed down traits.
The genes that allow a species to survive best
will be passed down to the next generation.
This causes a species to change over time.
You can even end up with a
Species of birds with softest fur.
Fur becomes a prized possession for pillow manufacturers
Therefore hunters seek birds with
LARGE wings, since there is a
tax for each bird caught.
Birds w/ Large Wings – DEAD
#3 – Pillow Making
Temp drops below freezing.
Dead birds all over the island.
Scientists notice they have all
Birds w/ Short wings – please sit down (DEAD)
#1 – Weather Change
All of you will be members of a single species.
Receive a card w/ the trait of your bird.
Once your receive card, Please memorize the trait.
Everybody will Stand up when I say so.
Groups of you will die, if you die, please sit down.
Natural Selection Game - Directions
Which moth is more likely to survive? WHY?
Group Practice (5 minutes)
PEPPER MOTHS pre-industrialization
Longer necks give
birth to longer necks
(trait is passed on in genes)
Giraffes with longer necks get better food, survive have more babies
Over time population will change to reflect
the traits that help the species survive
This is called
Natural selection leads to Evolution
What determines whether a species survives?
Ex: X-L wing birds could not fly.
This is called Natural Selection
Nature selects which traits and genes will survive
Group of Organisms capable of breeding and making offspring
Birds, Dogs, Cats, Whale-Shark
Can Court and Mate.
Make next Generation of Children.
Individuals living at the same time.
Ex: This class was one generation of birds.
The offspring will be the next generation.
#4 Courting and Mating
Sleeping Volcano Erupts.
Destroys all plant and life on ground.
Birds w/ X-large wings are too heavy
Birds w/ X-large wings – sit down
#2 – Dormant Volcano Erupts
You are a species of bird that has a range of traits for wing size.
Some of you have small wings,
medium wings, large wings, or
EXTRA LARGE wings.
Check to see which type of
wings you have!
Species of Bird – Sizes of Wings
What is evolution?
What is a species?
Bonus: How do you get a species?
01. Now, which moth would be more likely to
02. Explain how this happened