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

Ovulation takes place in the ovary and is part of the menstrual cycle.
Ovulation takes place in what organ and is part of the menstrual cycle?

Electron transport is the final stage of aerobic respiration, when energy from the krebs cycle is transferred to atp.
What is the final stage of aerobic respiration, when energy from the krebs cycle is transferred to atp?

Plasma comprises the sun and other stars, as well as lightning and the northern lights.

What material comprises the sun and other stars, as well as lightning and the northern lights?