Answer:
Cell Wall
Explanation:
Animal cells do not have cell walls, so their membranes act as walls. Therefore if put as an analogy, A function of the cell membrane in an animal cell is to a plant cell's wall.
Cyanobacteria are also very often referred to as "blue-green algae" because they are photosynthetic and aquatic in nature. They are important in the ecology as they help in forming the earth's oxygen atmosphere. Many oil deposits are attributed to the activities being performed by this group of microorganisms.
Is about 3 hours to my understanding