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

Ex Input:
Embryos usually don't survive if they have extra or too few of these genetic units?

Ex Output:
Embryos usually don't survive if they have extra or too few of these genetic units?

Ex Input:
When the phosphorus element - whose name means "light bringing" - was first isolated, scientists noted that it glowed in the dark and burned when exposed to air

Ex Output:
When what element - whose name means "light bringing" - was first isolated, scientists noted that it glowed in the dark and burned when exposed to air?

Ex Input:
Character displacement is the concept by which two species within the same area to coexist by adapting by developing different specializations.

Ex Output:
What is the concept by which two species within the same area to coexist by adapting by developing different specializations?