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

[Q]: Axillary buds in the axils of leaves and stems give rise to branches.
[A]: What in the axils of leaves and stems give rise to branches?


[Q]: Interstitial fluid are all hormones secreted into before entering the circulatory system.
[A]: Where are all hormones secreted into before entering the circulatory system?


[Q]: A calorie is used to express the amount of energy in food.
[A]:
Which unit is used to express the amount of energy in food?