TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: In science, theory is supported by much evidence, widely accepted by credible scientists, and unlikely to be disproved.

SOLUTION: In science, what is supported by much evidence, widely accepted by credible scientists, and unlikely to be disproved?

PROBLEM: Processing of filtrate in the proximal tubule helps maintain the ph level in body fluid.

SOLUTION: Processing of filtrate in the proximal tubule helps maintain what level in body fluid?

PROBLEM: Exact wavelength determines the color of visible light.

SOLUTION:
What determines the color of visible light?