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

Example Input: Passage: The cell membrane is made up of a phospholipid bilayer, two layers of phospholipid molecules. Notice the polar head group of the phospholipid is attached to the phosphate, and the tails are two fatty acid chains. The head group and tails are attached by a glycerol backbone. Answer: cell membrane
Example Output: What basic cell structure is made up of a phospholipid bilayer and two layers of phospholipid molecules?

Example Input: Passage: 19.4 Community Ecology Communities include all the different species living in a given area. The variety of these species is referred to as biodiversity. Many organisms have developed defenses against predation and herbivory, including mechanical defenses, warning coloration, and mimicry. Two species cannot exist indefinitely in the same habitat competing directly for the same resources. Species may form symbiotic relationships such as commensalism, mutualism, or parasitism. Community. Answer: symbiotic
Example Output: Commensalism, mutualism, and parasitism are known as what type of relationships?

Example Input: Passage: Primates are generally divided into prosimian and non-prosimian primates. Answer: primates
Example Output:
What are generally divided into prosimian and non-prosimian?