Toward the end of pregnancy, there is an imbalance in estrogen and progesterone.

________ is when the rates of two reactions are in balance

A) Reversible B) Equal balance C) Equilibrium D) None of the above

Placards are required of any material shipped in quantities of ___ pounds (kg) or greater

A. 501 (227) B. 751 (340) C. 1,001 D. 1,251