Final answer:
The exclusive organelle associated with plant cells is the cell wall. Other organelles like ribosomes, cytoplasm, and the Golgi apparatus are present in both plant and animal cells.
Step-by-step explanation:
The organelle that is only associated with plant cells is the cell wall. Option A is the correct answer, since the cell wall is a distinctive feature not found in animal cells. Unlike other choices like ribosomes, cytoplasm, and the Golgi apparatus, which are present in both plant and animal cells, the cell wall is unique to plant cells, as well as several fungi and bacteria. The cell wall provides structural support and protection, and it helps to maintain the shape of the cell. In addition to its structural role, it plays a part in controlling the movement of substances into and out of the cell.
The Golgi apparatus, while present in both plant and animal cells, has an additional role in plant cells of synthesizing polysaccharides, which are incorporated into the cell wall or used in other parts of the cell. Ribosomes, found in all types of cells including prokaryotes, are involved in protein synthesis. The cytoplasm is a jelly-like material that houses all cell organelles and is the site for many metabolic processes.