Sometimes it is necessary to add a vowel between the root and a suffix in order to make the word pronounceable. This ________ does not change the meaning of the other word parts

When wastes are not completely dissolved in the urine, a microscopic, hard crystal called a(n) ________ remains in the kidney

A) calculus B) calcification C) oxalate D) meteorite

Which molecules are the genetic material of cells?

a. Nucleic acids b. Amino acids c. Citric acids d. Carbonic acids