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

[Q]: Plant nutrition is the study of the chemical elements necessary for plant growth.
[A]: What is the study of the chemical elements necessary for plant growth called?


[Q]: Through tubular ducts part do exocrine glands discharge their contents.
[A]: Through what part do exocrine glands discharge their contents?


[Q]: We call the recycling of inorganic matter between living organisms and their environment biogeochemical cycle.
[A]:
What do we call the recycling of inorganic matter between living organisms and their environment?