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

Ex Input:
Passage: Electron affinity is a measure of the energy released when an extra electron is added to an atom. Answer: electron affinity

Ex Output:
What is the measure of the energy released when an extra electron is added to an atom?

Ex 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

Ex Output:
What is the basic characteristic of monoprotic bases?

Ex Input:
Passage: An organ is a structure composed of two or more types of tissues that work together to do a specific task. Most modern plants have several organs that help them survive and reproduce in a variety of habitats. Major organs of most plants include roots, stems, and leaves. These and other plant organs generally contain all three major tissue types. Answer: organ

Ex Output:
What do you call a structure composed of two or more types of tissues that work together to do a specific task?