Macroevolution Practice - Kate Turner | Library

Do not do this until we discuss it in class.

When you are done you should click submit and compare your answers to mine (which will show up when you click submit).

The next few questions are examples of reproductive barriers. You should identify which type of reproductive barrier the example describes.

Two hamsters can mate and make a zygote, but the fetus never fully develops.

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Is this a pre or postzygotic barrier?

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What type of reproductive barrier is this an example of?

Two snakes have similar colors and patterns. One mates in trees and one mates in the water.

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Is this a pre or postzygotic barrier?

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What type of reproductive barrier is this an example of?

Two geese live in the same habitat and can mate, but the sperm can never fertilize the egg to form a zygote.

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Is this a pre or postzygotic barrier?

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What type of reproductive barrier is this an example of?

Two snails live in the same habitat and have the same genital structures, but one mates in the spring and one mates in the fall.

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Is this a pre or postzygotic barrier?

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What type of reproductive barrier is this an example of?

Two birds have different mating calls and do not attract each other.

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Is this a pre or postzygotic barrier?

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What type of reproductive barrier is this an example of?

The rest of these questions are examples of macroevolution. You should identify which type of macroevolution the example describes and explain your answer in a few sentences (include a reproductive barrier if applicable). Remember, when you are done you should click submit and look at my answers to compare.

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There is a species of apple trees that cover an island off of the coast of Maine. Over 100 years the island is flooded and separates into two islands with some trees on each island. The trees on the first island start to develop larger flowers because there are larger pollinators on that island while the trees on the other island start to develop smaller flowers because there are smaller pollinators on that island. Over those 100 years, the flowers of the two trees become so different in size that they can no longer use the same pollinators (one can only be pollinated by a very small fly and the other is only pollinated by bats due to the difference in size of the flowers).
Explain what happened in this scenario.
Is there microevolution that occurred here?
Did macroevolution eventually happen? What kind?
Explain (including reproductive barriers if applicable)

Answer this question with a SOLID paragraph. (my answer is about 8 sentences)

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There is a species of salamanders that live on an island in the Galapagos. They both eat insects and worms in 1890 based on notes from naturalists of the day. Overtime there is increased competition in the area for resources and some of the salamanders start eating mostly insects while the others eat mostly worms. The salamanders eating insects become smaller overtime due to their lower caloric intake. The salamanders eating worms become larger due to their higher caloric intake. By 2005 the smaller salamanders and larger salamanders are no longer attracted to each other and therefore do not mate.

Explain what happened in this scenario.
Is there microevolution that occurred here?
Did macroevolution eventually happen? What kind?
Explain (including reproductive barriers if applicable)

Answer this question with a SOLID paragraph. (my answer is about 8 sentences)

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Scientists have discovered an ancient species of rhino that no longer exists today and seems to have died off due to climate changes in its habitat.
What type of macroevolution is this an example of?
Explain (including reproductive barriers if applicable) - (this answer is likely to be shorter than the last - my answer is 1 sentence)