Amplify Natural Selection

Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.

• Because they come from dominant alleles.

• Because they come from recessive alleles.

• Because the trait is an acquired phenotype.

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NGSS.MS-LS4-4

Do organisms "decide" to evolve and change?

• Yes, they know they need to change to survive 

• No, they change because of natural selection

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What is a trait that makes it less likely that an individual will survive in a specific environment

• A non-adaptive trait

• A feature

• A trait

• An adaptive trait

What can you tell about this population of newts from the histogram

• Most of the newts have high poison levels

• Most of the newts have medium poison levels

• Low poison level is the adaptive trait

• You cannot tell anything about the poison levels

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NGSS.MS-LS4-4

How can an individual be born with an adaptive trait?

• The individual can choose to change to the adaptive trait when they want to.

• The parents had genes for the adaptive trait, which they passed down to the individual.

• The individual can choose to have the adaptive trait at birth.

• The parents can choose for the offspring to have genes for the adaptive trait.

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NGSS.MS-LS4-4

If this population is adaptive, after 50 years how will this population change if there is a lot of rainfall?

• the thornpalms will shift to store more water

• the thornpalms will die out

• the thornpalms will stay about the same

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NGSS.MS-LS2-4

If this population is adaptive, after 50 years how will this population change if there is little to no rainfall?

• the thornpalms will stay about the same

• the thornpalms will shift to store less water

• the thornpalms will shift to store more water

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NGSS.MS-LS1-5

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Look at Diagram 1. How could you describe this newt population?

• There are fifteen poison levels shown, and each individual has a different amount of poison.

• There is one poison level shown, and all newts have the same amount of poison.

• There are three poison levels shown, and no poison-level trait is more common than the others.

• There are three poison levels shown, and one poison-level trait is the most common.

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NGSS.MS-LS4-4

2. 3. Look at Diagram 2. Did SOME newts from all poison levels die? (Xs over the newts mean they died)

• YES

• NO

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NGSS.MS-LS1-5

NGSS.MS-LS2-4

Cactuses with longer spines are less likely to be eaten by sheep. If their environment changes to have many bighorn sheep, which of the following cactus populations will most likely survive?

• Populations 1 and 2 will most likely survive.

• Populations 2 and 3 will most likely survive.

• Only Population 2 will survive because it is the only population with variation.

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NGSS.MS-LS2-4

NGSS.MS-LS4-4