Which type of plant cell is characterized as cube-shaped and involved in photosynthesis?

The parenchymal cell is indeed characterized by its cube-shaped structure and plays a crucial role in photosynthesis. These cells are typically found in the soft tissues of plants and are known for their thin cell walls, which allow for easy diffusion of gases and nutrients. In many plants, they contain chloroplasts, the organelles responsible for photosynthesis, enabling them to convert light energy into chemical energy. Because they make up the bulk of many plant tissues, they are essential for various functions including storage of carbohydrates, water, and nutrients, as well as photosynthetic activities in green tissue.

Collenchyma, while also a type of plant cell, provides structural support and is characterized by its unevenly thickened cell walls rather than being cube-shaped or primarily involved in photosynthesis. Sclerenchyma cells serve a different purpose, providing rigid support to mature plant parts with their thick, lignified walls. Meristematic cells, found at growth regions in plants, are undifferentiated and responsible for producing new cells but do not yet engage in photosynthesis. Thus, parenchymal cells stand out as the primary cells performing this vital process in plants.