Ahigher concentration of molecules causes a fast chemical reaction. this is know as a) the law of mass action b)chemical equilibrium c) activation energy d) metabolism

A

Explanation:

A- The law of mass action is defined as "the principle that the rate of a chemical reaction is directly proportional to the concentrations of the reacting substances". This means that as the concentration of the substrates are increased, the rate of the reactions also increases.

Chemical equilibrium is where the products are being formed as fast as the are turned back into the substrate.

Activation energy is the energy needed to start a chemical reaction.

Metabolism is the rate at which chemicals (specifically in the body) are broken down.

it creates acid rain

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.