Evolution and Biodiversity

“Evolution proceeds blindly, creating all of

the diversity we see in the natural world”. Explain what this means.

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The following image shows...

• Mutations

• Gene flow

• Genetic drift

• Natural selection

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Genetic diversity is the...

• Variety of habitats organisms live in

• Variety of species in a habitat

• Variety of traits in an organism

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Keystone species are critical to the survival of an ecosystem.

• True

• False

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A yellow and green iguana drift to an empty island on a log. They reproduce and populate the island with their offspring. This shows what process?

• Gene flow

• Genetic drift

• Mutations

• Natural Selection

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The creation of a new species due to some type of isolation is

• Speciation

• Natural selection

• Mutation

• Genetic flow

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The environment is brown. The bird can easily see the green beetles and eats lots of them. The brown beetles survive, reproduce, and pass on their genes. How does this affect the biodiversity in this environment?

• Increases biodiversity

• Decrease biodiversity

• Biodiversity is unchanged

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A hurricane came through a small island and randomly wiped out the ladybug population. There were only a few survivors left to repopulate the island. How would this affect the biodiversity on the island?

• Increase biodiversity

• Decrease biodiversity

• No change to biodiversity

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