Which of these contraceptive methods is most likely to cause side effects for females a. male condom b. spermicide c. female condom d. birth control pill

What is the main difference between trace elements and the main elements that make up the body? 1) main elements consist of heavier atoms. 2) trace elements are only needed in small amounts. 3) trace elements consist of heavier atoms. 4) main elements are only needed in small amounts.