Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
--------
Question: Vesicles are basic tools of the cell for organizing metabolism, transport, and storage of molecules.

Answer: What are basic tools of the cell for organizing metabolism, transport, and storage of molecules?

Question: Salt-water biomes in the ocean are called marine biomes.

Answer: Salt-water biomes in the ocean are called what?

Question: Nitrogen increases protein production in plants best explains the importance of nitrogen in the cycling of energy and matter.

Answer:
Which best explains the importance of nitrogen in the cycling of energy and matter?