Lava is the liquid form of a rock, but i don't believe that it is a rock itself......
Red blood cells play a huge part in the human body
Red blood cells transport oxygen throughout the body
They are able to carry oxygen because of an important protein called haemoglobin.
Not only does haemoglobin carry oxygen, but it's also responsible for the red color of our blood.
If red blood cells didn't contain haemoglobin the cells wouldn't be able to do their job properly. If this happens we would slowly die
They're assembled in the endoplasmic reticulum. It's the organelle where lipid components of the cell membrane are assembled, as well as proteins and other materials are exported from the cell.
Answer:
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The survival development and also the evolutionary development
