Membrane proteins are fundemental molecules for

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.

i say yes because i mean like they were born at the same time "in genesis in the " no, because who knows what humans have affected first it could be the ocean floor or the continent. mostly the continent older because that's what we live on & we mostly make manmade things on it.how's that?