Final answer:
Palisade cells are specialized plant cells found in the mesophyll layer of leaves. They are column-shaped and tightly packed, containing many chloroplasts for photosynthesis.
Step-by-step explanation:
Palisade cells are a type of specialized plant cell found in the mesophyll layer of leaves. They are column-shaped and tightly packed, forming a layer called the palisade parenchyma. The palisade parenchyma contains many chloroplasts, which are responsible for photosynthesis, making palisade cells vital for the plant's energy production.