Turn the given fact into a question by a simple rearrangement of words. This typically involves replacing some part of the given fact with a WH word. For example, replacing the subject of the provided fact with the word "what" can form a valid question. Don't be creative! You just need to rearrange the words to turn the fact into a question - easy! Don't just randomly remove a word from the given fact to form a question. Remember that your question must evaluate scientific understanding. Pick a word or a phrase in the given fact to be the correct answer, then make the rest of the question. You can also form a question without any WH words. For example, "A radio converts electricity into?"

Fact: when a sperm and an egg fuse this forms a zygote.
What forms a zygote?

Fact: lightning ignites fires.
what can lightning ignite?

Fact: A requirement for life is for cells to convert from oxygen and carbohydrates into carbon dioxide, water and energy.

Cells converting from oxygen and carbohydrates into carbon dioxide, water and energy is a requirement for what?

