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

Muscle type of cell function relies on microfilaments, which are the actin components of the cytoskeleton.
What type of cell function relies on microfilaments, which are the actin components of the cytoskeleton?

Force times distance is the equation for work.
Force times distance is the equation for what?

The sporophyte phase is the longest phase in the life of a(n) gymnosperm.

The sporophyte phase is the longest phase in the life of what?