Review: Natural Selection and Evolution

Choose the best phrase to fill in the blank. Individuals with advantageous traits will likely have ______ compared to individuals with disadvantageous traits.

• fewer offspring
• more offspring

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NGSS.MS-LS4-4

NGSS.MS-LS1-4

Which of these is an example of an advantageous trait?

• a trait that helps an organism camouflage from predators
• a trait that decreases an organism’s chance of mating
• a trait that makes it harder for an organism to compete for resources

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NGSS.MS-LS4-4

NGSS.MS-LS1-4

Choose the best word to fill in the blank. Traits that make it ______ for organisms to survive and reproduce will likely become less common in a population.

• easier
• harder

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NGSS.MS-LS4-4

NGSS.MS-LS1-4

Which statement about natural selection is true?

• Natural selection occurs over multiple generations.
• Natural selection can change traits in a population, but has no effect on genes.
• Natural selection happens because organisms in a population have identical traits.

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NGSS.MS-LS4-4

Differences in traits within a population are called:

• DNA
• variations
• natural selection
• fitness

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NGSS.MS-LS4-4

What type of variation can you identify in this population of snails?

• different sizes
• different food resource
• different habitat
• different colors

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NGSS.MS-LS4-4

Which trait would be advantageous within this population of snails?

• The brown snails are better able to blend in with the beach and are eaten less often by the birds.
• The blue snails will turn brown to avoid getting eaten.
• The green snails move slower than red snails.
• The red snails can float in the water.

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NGSS.MS-LS4-4

What do you think this snail population will look like in a few generations?

• The snails will all reproduce and pass on their traits at the same rate, so the population will look similar to what it looks like now.
• Only surviving snails will reproduce and pass on their traits to the next generation, so the population will have a greater percentage of blue snails in the future.
• Only surviving snails will reproduce and pass on their traits to the next generation, so the population will have a greater percentage of brown snails in the future.
• Only surviving snails will reproduce and pass on their traits to the next generation, so the population will have a greater percentage of red snails in the future.

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NGSS.MS-LS4-4

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The change in the snail population over time follows which theory of change over time?

• This follows Darwin's theory of change that some individuals in a population happen to be better suited to the environment (have traits that give them an advantage), and they’re more likely to survive and reproduce.
• This follows Lamark's theory of change that organisms will change their behavior or structure in response to environmental change and pass those acquired traits on to their offspring.
• Neither of these.

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NGSS.MS-LS4-4

Is bird beak size an inherited or acquired trait?

• inhertied
• acquired

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NGSS.MS-LS3-1

NGSS.MS-LS1-5