A researcher is investigating three unknown biological samples: X, Y, and Z. Microscopic analysis reveals the following characteristics:
- Sample X: Cells possess a cell wall, chloroplasts, and a large central vacuole, enabling them to produce their own food.
- Sample Y: Cells lack a true nucleus and mitochondria, but contain a peptidoglycan cell wall, ribosomes, and circular DNA plasmids.
- Sample Z: Cells contain mitochondria and ribosomes but no cell wall or chloroplasts. These cells are highly specialized and organized into tissues responsible for the rapid conduction of electrical impulses.
Based on this information and established biological classifications, which statement correctly identifies the cell types and accurately describes a key organizational aspect for Sample Z?