What does the Murphree Water Treatment Plant use to disinfect the water? a. chlorine. b. phosphorus. c. oxygen. d. nitrogen. e. iodine.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".