In the hot climate, human bodies had to adapt by increasing the number of on the skin to cool off the body. A. Body hair

B. Sweat Glands

C. UV rays

D. None of the above

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl