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

Ex Input:
Passage: Colonial organisms were probably one of the first evolutionary steps towards multicellular organisms. Algae of the genus Volvox are an example of the bridge between colonial organisms and multicellular organisms. Each Volvox , shown in Figure above , is a colonial organism. It is made of up to 50,000 photosynthetic flagellate algae that are grouped together into a hollow sphere. Volvox live in a variety of freshwater habitats, and were first reported by Antonie van Leeuwenhoek in 1700. Answer: multicellular

Ex Output:
Colonial organisms were probably one of the first evolutionary steps towards which type of organisms?

Ex Input:
Passage: Meiosis is the type of cell division that produces gametes. Answer: meiosis

Ex Output:
What is the type of cell division that produces gametes?

Ex Input:
Passage: Oxygen has an oxidation state of -2 in most of its compounds. Oxygen is the second most electronegative element, so it also tends to be assigned all shared electrons. Exceptions include O 2 (oxidation state = 0), peroxides, in which two oxygen atoms are connected by a single bond (oxidation state usually = -1), and any compound in which oxygen is bonded to fluorine (pretty rare and reactive). Answer: oxygen

Ex Output:
What is the name of the second most electronegative element?