4,276 round to nearest thousand

There are six elements that make up most of the human body. which of the following is not one of these six elements?

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen