Answer:
Red blood cells transport oxygen around the body. They are specialised to carry oxygen because they: contain large quantities of a protein called haemoglobin , which can bind oxygen. don't have a nucleus, so there is more room for haemoglobin.
Explanation:
<span><span>Carbon Hydrogen Nitrogen Oxygen Sulphur</span>
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A.
Explanation: Because he learned it in previous years when it was different, now it becomes hard to learn the new information.
<span>A substance that is capable of acting as both an acid and a base is called
amphoteric</span>