Culture . is more developed in contemporary North America than in contemporary China first emerged among humans around 10,000 years ago is predominantly transferred through genes shapes natural, biological functions

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.

plato users:

d.  

there was a variety of food available on island x, but there were only large seeds and nuts on island y.

answer denitrification;