Does it make sense to make lactase if
there is no lactose present?

However, because lactose-free milk contains added lactase, it's easier to tolerate for those with lactose intolerance, making it a good alternative to regular milk. Lactose-free milk is easier to digest for people with lactose intolerance because it contains lactase, the enzyme used to break down lactose.

Explanation:

hope i helped :)

they both go up but then go back down. they both end lower than they started. lastly, they both are competitive/the second on.

explanation:

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.