It is referred to as a selective semipermeable membrane because it only allows certain things through, due to the size and shape of whatever is trying to get through.
I think that is -7 cause 33+7=40 so 33-40 would be -7
If you have just eaten a mean high in complex carbohydrates, amylase is the enzyme that will help to digest the meal.
Answer:
A trophic level is a level of an organism in the food web, and can be a producer, primary consumer, secondary consumer, apex predator, decomposer, etc.
