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stepladder [879]
3 years ago
8

A unique characteristic of mammals is that they _____. have hair have a four-chambered heart have both aquatic and terrestrial s

pecies
Biology
2 answers:
Deffense [45]3 years ago
7 0
Offspring feed on milk, or females produce milk.

Hope it helped!
victus00 [196]3 years ago
4 0
<span>A unique characteristic of mammals is that they have hair. </span>
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