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

Ex Input:
The newest, outer layers of secondary xylem are called sapwood.

Ex Output:
What are the newest, outer layers of secondary xylem called?

Ex Input:
Most have cells that are not able to exchange gases with the outside environment do multicellular organisms need transport systems.

Ex Output:
Why do multicellular organisms need transport systems?

Ex Input:
Clavicle supports the scapula, transmits the weight and forces from the upper limb to the body trunk, and protects the underlying nerves and blood vessels.

Ex Output:
What supports the scapula, transmits the weight and forces from the upper limb to the body trunk, and protects the underlying nerves and blood vessels?