A vein in a leaf has what important function? a. forming a venation pattern
b. supporting the leaf blade
c. permitting guttation
d. controlling the opening of stomata

Pepsin is an enzyme in the stomach that breaks polypeptides into amino acids. pepsin functions best at a ph of around 1.5. what would be the most likely result if the ph of the stomach were increased to 5

Why do carbohydrate molecules function so well as fuel for the body?

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.