True or False
Early red blood cells are large, they have a nucleus, very little cytoplasm, and they lac hemoglobin.
As a red blood cell matures, it becomes smaller, increases its hemoglobin content, and loses its nucleus.
The loss of the nucleus results in the RBC gaining its biconcave shape
it isn't mature yet; it still contains some mitochondria, ribosomes and sum ER .These are called reticulocytes