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

[EX Q]: Ecological pyramids can demonstrate the decrease in energy, biomass or numbers within an ecosystem.
[EX A]: What can demonstrate the decrease in energy, biomass or numbers within an ecosystem?

[EX Q]: Most protein antigens require signals from helper t cells (th2) to proceed to make antibody.
[EX A]: Most protein antigens require signals from helper t cells (th2) to proceed to make what?

[EX Q]: In science, theory is supported by much evidence, widely accepted by credible scientists, and unlikely to be disproved.
[EX A]:
In science, what is supported by much evidence, widely accepted by credible scientists, and unlikely to be disproved?