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1.    Explain how do the following observations support the theory of evolution by natural selection?

a)    Related species will live in diverse environments in one area (for example, South America) but can be very different from the species in similar environments in another area (for example, Asia).


.



b)    Animals found on islands look similar to animals found on neighboring islands and the closest continent.







2.    Elephants today have long, flexible trunks. At some point in the past, some ancestor to the elephant had a shorter, less flexible nose.

a.    What two advantages does the trunk give to an elephant?

b.    How would Lamarck explain the change that resulted in a flexible trunk?üü

c.     How would Darwin explain the change that resulted in a flexible trunk?üü

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