7A, B, C Review

Which of the following is true about natural selection?

• Natural selection decreases genetic diversity.
• Natural selection is a random process.
• Natural selection only affects individual organisms.
• Natural selection is seen when favorable traits are passed on due to better survival rates.

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How does variation interact with natural selection?

• Variation has no impact on natural selection.
• Natural selection occurs without any variation among individuals.
• Variation is detrimental to the process of natural selection.
• Variation is essential for natural selection, as it allows for the differential survival and reproduction of individuals based on their traits.

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Match the following word to the correct definition.

• favorable trait that allows survival

• Natural Selection

• 2 pops swapping genes

• Evolution

• change in a population's gene pool

• Gene Flow

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How do mutations, adaptations, and natural selection work together?

• Mutations create genetic diversity, adaptations enhance survival, and natural selection favors advantageous traits.
• Mutations are harmful, adaptations are unnecessary, and natural selection is random.
• Mutations eliminate genetic diversity, adaptations weaken survival, and natural selection ignores traits.
• Mutations are only beneficial, adaptations are always inherited, and natural selection occurs in isolation.

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Which of the following gives an explanation for the change on the selection curve?

• After the environment changes, the black butterflies were best suited for survival

• After the environment changes, the orange butterflies were better suited for survival

• After the environment changes, the white and black butterflies were better suited for survival

• After the environment changes, the orange butterflies were dying at a fast rate

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The trait for white fur ​ (a)   over time. The environmental change caused the ​ (b)   trait, grey, to be most advantageous. The evidence for this can be seen where the number of grey individuals ​ (c)   while the extreme traits ​ (d)   in number.

• decreased
• average
• increased
• extreme
• stayed the same
• diminished
• remained constant

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Match the following graph to the description.

• selects for the average trait

• 
• selects for one extreme trait

• 
• selects for both extreme traits

• 

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A  population of cockroaches was sprayed with an insecticide.  Some cockroaches survived and produced a population of cockroaches that was resistant to this spray.  What can BEST be inferred from this example?

• species will adapt no matter what the environment
• environment has no effect on the survival of an organism
• Individuals with favorable variations survive and reproduce
• Insecticides cause mutations that are passed on to the next generation

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How has antibiotic resistance changed over time?

• It hasn't changed at all.

• Bacteria are becoming less resistant to the antibiotics that are being prescribed.

• Humans are buying less antibiotics, and antibiotics are becoming more effective.

• Bacteria are becoming more resistant to the antibiotics that are being prescribed.

Why do we need a new vaccine for Influenza every year?

• because the virus mutates very quickly

• because the virus is unknown

• because the vaccine works for a short time

• none of the answers

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