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:
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A aquifer<span> names an underground area that collects and holds a large amount of water.
I know this because an aquifer collects water.
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The answer will be an ecosytem