Given a scientific passage and an answer, generate a question for the given answer.

Input: Consider Input: Passage: Similarly, monoprotic bases are bases that will accept a single proton. Diprotic acids contain two ionizable hydrogen atoms per molecule; ionization of such acids occurs in two steps. The first ionization always takes place to a greater extent than the second ionization. For example, sulfuric acid, a strong acid, ionizes as follows: K a1 = more than 10 2 ; complete dissociation. Answer: accepts one proton

Output: What is the basic characteristic of monoprotic bases?

Input: Consider Input: Passage: The cardiovascular system moves nutrients and other substances throughout the body. Answer: cardiovascular system

Output: Which human body system system moves nutrients and other substances throughout the body?

Input: Consider Input: Passage: 15.4 Alterations of chromosome number or structure cause some genetic disorders. Answer: alterations of chromosome
Output: What causes genetic disorders in humans?