Final answer:
Sclerenchyma cells give pears their grittiness. They have thick secondary cell walls with deposits of lignin and are responsible for the gritty texture found in pears.
Step-by-step explanation:
Sclerenchyma cells give pears their grittiness. Sclerenchyma cells are a type of plant cells that provide support to the plant. There are two types of sclerenchyma cells: fibers and sclereids. Sclereids are responsible for the gritty texture found in pears. They have thick secondary cell walls with deposits of lignin, an organic compound. Humans also utilize sclerenchyma fibers to make linen and rope.
The type of cells that give pears their grittiness are sclerenchyma cells, specifically the type known as sclereids. Sclerenchyma cells are known for providing support to the plant, and many are dead at maturity. They possess secondary cell walls that are thickened with deposits of lignin, making them rigid and tough. While fibers, which are long and slender sclerenchyma cells, are used by humans to make products like linen and rope, the sclereids are smaller and responsible for the characteristic gritty texture in pears.