When blood is in the lungs,
where oxygen is plentiful, oxygen easily binds to the first subunit and then quickly fills up the remaining ones. Then, as blood circulates through the body, the oxygen level drops while that of carbon dioxide increases. In this environment, hemoglobin releases its bound oxygen.
A: between the hydrogen atom of one water molecule and the oxygen atom of another
The group of plants that is most successful would probably be Angiosperms! They're also known as flowering plants or anthophytes.
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