Conditions for Natural Selection

Conditions for Natural Selection

Unit 3.1

Open Ended

Observe the pictures of the javelina and the cacti.

1. What do you observe in picture one?

Open Ended

Observe the pictures of the javelina and the cacti.

2. What is the difference between picture one and picture two?

Open Ended

Observe the pictures of the javelina and the cacti.

3. Why is the javelina not eating the cactus on the right?

Open Ended

Observe the pictures of the javelina and the cacti.

4. What happens to the cactus the javelina was eating by picture four?

Open Ended

Observe the pictures of the javelina and the cacti.

5. What is different about the cactus the javelina was not eating in picture three?

Open Ended

Observe the pictures of the javelina and the cacti.

6. How do plants use flowers?

Open Ended

Observe the pictures of the javelina and the cacti.

7. What is different about picture four?

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8. There are three necessary conditions that must be met for natural selection to occur. The first is there must be variation in characteristics. Different individuals in a population must have different traits. What is the different trait the surviving cactus has?

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9. The next condition is there must be a difference in fitness. The different traits must help the individual survive and reproduce. How did the different trait help the one cactus survive and reproduce? Chose the most complete answer.

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10. The last condition is that the trait that affects fitness must be inheritable. The trait must be able to be passed by genes from one generation to the next. How do you know that the different trait was passed to the next generation?