instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Potential energy type of energy is possessed by autumn leaves before they fall.
answer:
What type of energy is possessed by autumn leaves before they fall?


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


question:
Chelates is the term for polyatomic ligands with two or more donor atoms.
answer:

What is the term for polyatomic ligands with two or more donor atoms?