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OpenStudy (anonymous):
Which of the following best describes similarities that exist between birds and mammals? They are both endothermic and have four-chambered hearts. They both have specialized lungs and sweat glands for cooling. They are both vertebrates that have specialized teeth for grinding food. They both undergo internal fertilization and have mammary glands to nurse their young.
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OpenStudy (anonymous):
The first one
OpenStudy (anonymous):
Welcome to OpenStudy, @mathhelpplease11 !
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