Apure substance containing only one kind of what?

Matthew decided he wanted to hike up mount everest. on his way to the top, it began to snow and the temperature dropped to -10°f. matthew forgot to wear a heavy jacket so his body began to shiver beyond control. in this case, matthew's body shivering is the to a drop in temperature. * 0 points reflex stimuli responce environmental facto

Number and variety of living organisms includes genetic, species, and ecological types

Kinases add - groups to other enzymes. this activities some enzyme while inhibiting other