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

[Q]: Plankton is the most common life form in the ocean.
[A]: What is the most common life form in the ocean?


[Q]: In machines that increase force, such as ramps and doorknobs and nutcrackers, output is greater is the relation between output and input force.
[A]: In machines that increase force, such as ramps and doorknobs and nutcrackers, what is the relation between output and input force?


[Q]: Cytoplasm and cell wall parts of the cell does cell differentiation involve changes in.
[A]:
What parts of the cell does cell differentiation involve changes in?