The iron-containing protein that gives cells their red color is called:
(1 point)
Responses
plasma.
plasma.
leukocyte.
leukocyte.
hemoglobin.
hemoglobin.
lymph.
(1 point)
Responses
plasma.
plasma.
leukocyte.
leukocyte.
hemoglobin.
hemoglobin.
lymph.