Natural Selection of Teddy Grahams

Story:

You are a bear-eating monster (Grrrrrrrr). There are two kinds of bears: Happy Bears and Sad Bears. You can tell the difference between them by the way they hold their hands. Happy Bears hold their hands high in the air and Sad Bears hold their hands down low. Happy Bears taste sweet and are easy to catch. Sad Bears taste bitter, are sneaky, and are hard to catch. Because of this, you eat only Happy Bears. New bears are born every 'year' (during hibernation) obtain another handful of bears if two or more are left in your population from the previous generation.

Procedure:

1. Obtain a population of 20 bears, and record in table 1 the number of each of the following: Generation Number, Total Number of Happy Bears, Total Number of Sad Bears, and Total Population. You must create a data table that has at least 6 generations.

2. Eat three Happy Bears. If you don't have three Happy Bears, then eat what you have in Happy Bears.

3. If you have at least 2 bears they can reproduce. If they reproduce, get a new generation from the box. A new generation is five bears (randomly selected).

4. Repeat steps until you have a total of 6 generations.

5. Create a new data table that has the total percentage of each type of bear for each generation (divide the number of that type of bear by the total number in that generation.

6. Graph the population results from the second table.

Problem:

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Hypothesis:

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Observations:

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