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The degenerated wing of a kiwi is an acquired character. Why is it an acquired character?
a. Kiwis require wings since they must fly .
b. Animals' characteristics evolved due to environmental changes .
c. Kiwi wing degeneration is due to a lack of usage of wings over generations .
d. Kiwi does not have tiny wings and hence is unable to fly .
e. The vestigial wings are small in kiwi under the bristly, hair-like two-branched feathers.
f. The degeneration of a kiwi's wing is an inherited trait .
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