Given a scientific question, generate a correct answer to it.

Example Input: Ocean ridges formed by marine invertebrates living in warm shallow waters within the photic zone of the ocean are called what?
Example Output: coral reefs

Example Input: What two basic types of feather does a bird have?
Example Output: flight and down

Example Input: Many carbohydrates can enter glycolysis, most often after conversion to what?
Example Output:
glucose