Question

9 multiple choice 0.8 points this substance is derived from the cell walls of algae. protein glucose agar fats starch

Explanation:

Agar is a substance derived from the cell - walls of certain algae. Proteins are macromolecules with various sources not specifically from algal cell - walls. Glucose is a simple sugar and not typically known for being derived from algal cell - walls. Fats have different origins and are not mainly from algal cell - walls. Starch is a carbohydrate but not specifically from algal cell - walls.

Answer:

C. agar