Do Now:

1.What do you know about

evolution?

2.Have you ever heard of Charles Darwin?

REVIEW!!!!

Before we look at evolution, lets review some key concepts…

Can you tell me what traits are ? How about DNA? How about mutations?

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1. Traits

Characteristics organisms have due to

their genetics

Example: Brown hair, blue eyes, long

fur, feathers

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2. DNA

Deoxyribonucleic acid,

Molecule in the nucleus of our cells that tell our cells

what to do

You get half your DNA from you mom,

half from you dad

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3. Mutations

Changes in DNA, could be harmful or helpful

Think about this question: How have phones devices changed?

Think about this question: How have personal musical devices

changed?

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1. Evolution

change in the hereditary features of a species over time - due to mutations in their

DNA

Horse Evolution

Whale Evolution

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2. Charles Darwin

Theory of Natural Selection about

evolution

it is still accepted today

Darwin’s ObservationsDarwin went on an expedition to the

Galapagos Islands and became the ship’s naturalist. (He studied plants and animals at every island they stopped.)

Darwin collected many plants and animals and observed many new species in the Galapagos Islands.

Species – group of organisms that can reproduce successfully

Many different species of finches, but they lived so close?

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3. Species

Group of organisms that can mate with one another to produce fertile

offspring

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4. Adaptation

A characteristic that helps an

organism survive and

reproduce in its environment

Examples: polar bear fur, bird

wings

NOTE!Adaptations are caused by

mutations in DNA. An organism cannot CHOOSE to have an adaptation and then pass it on to their children!!

Darwin’s finches: adaptations: - bird beak shapes are examples of

adaptations

Questions

1. What is evolution?

2. Some insects look just like sticks. How could this be an advantage to the insects?

3. What are some adaptations that a shark has?