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Which sentence best describes vestigial structures? They contain genetic mutations. They may have had an important function in the past. They are necessary for an organism's survival. All animals have them.
Answer: They may have had an important function in the past.
Explanation:
Vestigial structures are the ones which are present in an organism but do not serve any essential function in the organism.
It is believed that these structures must have served an important function in the past but have lost their functionality over the course of evolution.
An example of vestigial structures found in humans is the tailbone.
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