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

Zinc is active transition metal kind of metal.
Zinc is what kind of metal.?

Hybridization model model helps explain molecules with double or triple bonds.
Which model helps explain molecules with double or triple bonds?

The liver packages nutrients absorbed by the digestive system; produces plasma proteins, clotting factors, and bile; and disposes of worn-out cell components and waste products.
What organ packages nutrients absorbed by the digestive system; produces plasma proteins, clotting factors, and bile; and disposes of worn-out cell components and waste products?