The correct answer would be all of the above. The bone marrow is where both types of blood cells are formed: red blood cells or erythrocytes and white blood cells of lymphocytes, along with cells that help defend the body against diseases and germs, which is the same as white blood cells. Red blood cells are vital in providing oxygen to cells as fuel whole white blood cells are responsible for maintaining immunity.
Answer:
The basic biological unit of heredity.
Explanation:
