I think it would be A. Helicase
Answer:
x1000 the concentration of hydronium ions in a solution with pH 1 is 1000 times greater than one pH 4
Answer: the first one is armature and the second one is pole
"Anterior" means "to the front". A horse's head is anterior to the rest of its body. Contrariwise, "posterior" means "to the back", like a horse's tail.
Hope that helped! =)