How might reduced enzyme function lead to disease?

Which mantle is under the crust the upper mantle or the lower mantle i think it's upper let me know if i'm right

What occupation did muhammad have before the first revelation

Which of the following is an example of competition that could be found in a forest? question 14 options: deer eat berries and their droppings seed new areas creating more berry bushes two fox populations utilize the same rabbit population as their main food source two hawk populations utilize the same scorpion population as their main food source lack of sunlight due to changes in the seasons restricts the growth of certain plants