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

[Q]: Eyespots do the cells in the front of a volvox typically develop to help swim towards light.
[A]: What do the cells in the front of a volvox typically develop to help swim towards light?


[Q]: Cloudy conditions will most likely result from a low-pressure weather system.
[A]: Which will most likely result from a low-pressure weather system?


[Q]: An electrical signal along a nerve cell triggers the secretion of neurotransmitter molecules.
[A]:
An electrical signal along a nerve cell triggers the secretion of what?