Question

multiple choice question
which cell has the shape of a biconcave disc?
hemocytoblast
red blood cell
white blood cell
lymphoblast

Explanation:

Red blood cells are characterized by their biconcave - disc shape, which increases their surface area for gas exchange. Hemocytoblasts are stem cells, white blood cells have various shapes like spherical, and lymphoblasts are also not biconcave - disc shaped.

Answer:

Red blood cell