Name _________________
Date __________________
The Evidence of Evolution
PCA #1 ______________________________________________
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Natural Selection
1. What are the 4 parts to Darwin’s Theory of Natural Selection?
i. _____________________
ii. ____________________
iii. ____________________
iv. ____________________
2. Choose an organism and use it in an example of Darwin’s 4 parts of Natural Selection.
(You cannot use spiders or Sea Turtles, as I have already used this example)
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3. Connect the Elephants of Ugunda to Darwin’s theory of Natural Selection.
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4. How did the Peppered moths of Great Britain help prove the theory of Natural Selection
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5. How is Selective Breeding different than natural Selection
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5. Evolution by Natural Selection
An adaptation is an inherited characteristic that helps an organism survive and reproduce in its
environment. Over time, adaptations become more and more common in the population. For
example, suppose that the water in a pond gets darker over a period of 4 years. The diagrams and
the table below show what might happen to a frog population living in the pond.
Adaptations of Frog populations Over Time
Year
Light Colored Frogs
Dark Colored Frogs
6
1
2
3
4
Answer the Questions:
1. In which year was the number of light colored frogs greater than the number of dark colored
frogs? _______
2. How did the numbers of light colored and dark colored frogs change over time?
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3. Which adaptation is best suited to life in the pond in year 3? Circle the answer
Light colored
dark colored
4. How do the dark colored frogs show “survival of the fittest” ?
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EXIT QUSTION:
Directions: Take a look at the
image to the right. Explain
how natural selection is taking
place on the island. Be sure
to explain how each organism
is doing its part.
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