Mechanisms of Evolution

Which of the following is NOT a mechanism of evolution?

• Sexual Selection

• Genetic Drift

• Random mating

• Natural Selection

• Gene Flow

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The diagram represents which mechanism of evolution?

• Gene Flow

• Genetic Drift

• Natural Selection

• Sexual Selection

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In California, mismanagement of forests and the suppression of wildfires resulted in large, dangerous fires instead of small, quick burning fires. These large fires are catastrophic to the native ecosystems and kill large percentages of animals and plants. What mechanism of evolution would this be?

• Natural Selection

• Genetic Drift

• Gene Flow

• Artificial Selection

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Natural Selection can be summarized as survival of the _____________

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What does the term fitness mean in relation to natural selection and evolution?

• The strongest

• The fastest and strongest

• The most likely to survive in its environmental conditions

• The most intelligent, quickest, and strongest

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Kazaringa National Park in Nepal is the home to large amounts of Greater-One Horned Rhinos. However, it is common for floods to kill many rhinos during monsoon season. What mechanism of evolution does this scenario fall under?

• Natural Selection

• Sexual Selection

• Genetic Drift

• Gene Flow

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Over time, watermelons have evolved from the small berries seen in the image to the large ones we buy at the store today. This is a result of humans breeding the watermelon plants that produced the largest berries together year after year. What mechanism of evolution is this an example of?

• Natural Selection

• Artificial Selection

• Sexual Selection

• Gene Flow

Which of the following mechanisms of evolution are considered to be non-random?

• Genetic Drift

• Gene Flow

• Natural Selection

• Artificial Selection

• Sexual Selection

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Male and female turkeys have very different appearances. Male turkeys present facial "headgear" that is attractive to the female turkeys. Those with the biggest headgear get the mating rights with the females and have a higher chance of breeding. What mechanism of evolution is this an example of?

• Natural Selectoin

• Sexual Selection

• Artificial Selection

• Genetic Drift

Due to poaching, elephants are hunted for their tusks by humans to be used as decorations in homes. Those with the largest tusks are the most targeted, and those with no tusks are left alone. Over time, the number of tuskless elephants in some areas has gone from 1% to nearly 75%. What mechanism of evolution is this?

• Artificial Selection

• Natural Selection

• Sexual Selection

• Gene Flow

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