Excess hydrogen ion is eliminated from the body largely by

According to the big bang theory, after the "bang," the universe remained dark until about  300,000 yearsone billion yearsthree minutesthree billion years  later, when neutral atoms began to form.

Facilitates growth and change in neurons and the migration of neurons to different sites in the brain

Suggest why placing wheels under a heavy box reduces the neccessary force required to push it along at a constant speed.