It lacks te cheche
Prokariyotes lack a nucleus.Mamalian erythrocytes,seive tube elements also lack.
Red blood cells, also known as erythrocytes, lack a nucleus.
because they lack nucleus.
Organelles don't have nucleus's because the nucleus is an organelle
Erythrocytes, or red blood cells, lack a nucleus, mitochondria, endoplasmic reticulum, and Golgi apparatus. They are primarily focused on carrying oxygen and lack many organelles to make room for hemoglobin, the protein responsible for oxygen transport.
They use glucose anaerobically because of the lack of mitochondria
Brains.
Red blood cells (erythrocytes) do not have nuclei.
If stem cells mature into erythrocytes (red blood cells), they will become specialized for oxygen transport in the body. Erythrocytes are responsible for carrying oxygen from the lungs to the rest of the tissues and organs, as well as removing carbon dioxide waste. They have a unique biconcave shape and lack a nucleus to maximize their capacity for oxygen-carrying.
It is the nucleus .Prokariyotes lack a nucleus.
erythrocytes Erythrocytes
Since you asked about the main organelle, singular, I will have to say....The membrane bound nucleus that eukaryotes have and prokaryotes do not.