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

[EX Q]: The newest, outer layers of secondary xylem are called sapwood.
[EX A]: What are the newest, outer layers of secondary xylem called?

[EX Q]: Cranium (skull) is the term for the skeletal structure of the head that supports the face and protects the brain.
[EX A]: What is the term for the skeletal structure of the head that supports the face and protects the brain?

[EX Q]: Most lipids in your diet should be unsaturated type, found mainly in plant sources and also in fish.
[EX A]:
Most lipids in your diet should be what type, found mainly in plant sources and also in fish?