Evolution Review Game

What is natural selection?

• a process in nature in which organisms possessing certain inherited traits are better able to survive and reproduce compared to others of their species.

• a random occurrence that affects all species equally.

• a method by which humans select traits in animals.

• a process that leads to the extinction of all species.

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Directional Selection: ______.

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Disruptive Selection: ______.

• Both phenotypic extremes are favored over the intermediate phenotype

• Only the intermediate phenotype is favored

• Neither phenotypic extremes nor the intermediate phenotype is favored

• Only one phenotypic extreme is favored

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Identify the type of selection shown in each of the graphs below. The graph at the top of the image shows a normal distribution of traits in a population (in this case, fur color in mice). What type of selection is shown in the first graph?

• A) Stabilizing

• B) Directional

• C) Disruptive

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What type of selection is shown in the second graph?

• A) Stabilizing

• B) Directional

• C) Disruptive

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What type of selection is shown in the third graph?

• A) Stabilizing

• B) Directional

• C) Disruptive

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Genetic drift is a change in the allele frequency in a population due to (natural selection / random event). Fill in the blank: Genetic drift is a change in the allele frequency in a population due to ________.

• random event

• natural selection

• mutation

• gene flow

Explain the Bottleneck Effect with an example from the image.

• The Bottleneck Effect is a phenomenon where a significant percentage of a population is killed or otherwise prevented from reproducing, leading to a loss of genetic variation.

• The Bottleneck Effect is a process where a population expands rapidly, increasing genetic diversity.

• The Bottleneck Effect is a situation where a population remains stable over time, maintaining genetic diversity.

• The Bottleneck Effect is a scenario where a population is isolated, leading to increased genetic variation.

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What are vestigial structures?

• Humans have extra molars, called wisdom teeth. These teeth were used to chew up and grind plant matter. However, they are no longer functional and often removed.

• Humans have a tailbone, which is a remnant of a lost tail.

• The appendix in humans is a vestigial structure that has lost its original function.

• The human ear muscles are vestigial and no longer serve a purpose.

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What is fossil evidence?

• The horse can be traced to an animal the size of a dog having several toes on each foot and teeth appropriate for browsing; this animal, called the dawn horse, lived more than 50 million years ago. The most recent form, the modern horse, is much larger in size, is one-toed, and has teeth appropriate for grazing.

• Fossil evidence refers to the remains or traces of ancient organisms preserved in rocks.

• Fossil evidence is the study of living organisms and their habitats.

• Fossil evidence is the process of creating new species through genetic engineering.

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