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

The sun delivers power to the chemical factory chloroplasts.
What delivers power to the chemical factory chloroplasts?

The name for a matter that has a fixed volume and a fixed shape is solid.
What is the name for a matter that has a fixed volume and a fixed shape?

Enzymatic cascades help amplify the effects of extracellular signals.

What helps amplify the effects of extracellular signals?