instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Glycerol is a triol, an alcohol which contains three hydroxl functional groups.
answer:
Glycerol is a triol, an alcohol which contains three what?


question:
Together, the muscular and skeletal organs are known as the musculoskeletal system.
answer:
Together, the muscular and skeletal organs are known as what?


question:
Leaves respond to these environmental stimuli by producing less chlorophyll.
answer:

Leaves respond to these environmental stimuli by producing less what?