Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Example Input: Present-day plants that have a complex vascular tissue system are called vasuluar plants.
Example Output: Present-day plants that have a complex vascular tissue system are called what kind of plants?

Example Input: The majority of human genes have two or more possible alleles.
Example Output: How many possible alleles do the majority of human genes have?

Example Input: Through tubular ducts part do exocrine glands discharge their contents.
Example Output:
Through what part do exocrine glands discharge their contents?