Haemoglobin transports oxygen in the blood of vertebrates. So, no, we would not survive without it!
The red blood cells don't loose hemoglobin. Hemoglobin is the protein the oxygen binds to. So I think a better question is " What is the colour of RBC's without oxygen?" And the answer in a dark red.
The function of a red blood cell is to transport oxygen; it does this without having to carry out any metabolic functions, because the chemical hemoglobin has the capacity to absorb and to release oxygen by itself. Red blood cells do not undergo cell division, since they are made in the bone marrow. They are just packages of hemoglobin.
yes
Yes, of course! Low Hemoglobin means anemia, and it is said that "there are not leukemia without anemia"
White blood cells and platelets are the blood cells without hemoglobin. It is found in red blood cells.
The importance of hemoglobin for erythrocyte function is that it gives them oxygen carrying abilities. Without hemoglobin, the erythrocyte would be unable to carry and transport oxygen where it needs to go.
It is a genetic adaptation; without nucleus more space for hemoglobin is free. And hemoglobin is the carrier of oxygen.
It can survive without an axon but not without its cell
You need energy to survive, so you cannot survive without energy.
The planet can survive without light, but you won't
Giraffes cannot survive without water