Biology

Which of the following human traits can be used, like fingerprints, for identification?

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What kind of animal is almost completely blind at birth?
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What is a loss of water called?
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Which of these animals would most likely be found in a pond?
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What is any permanent change to a gene called?
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What has been the increase in tropical sea temperatures during the past 100 years?
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What arctic sea whale has one long horn on its head?
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What body covering do mammals have that other animals do not?
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What would you call a nautical unit of speed?
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