Hemoglobin has tetrahedral structure containing four heme groups that surround a globin group.
Heme is ringlike organic compound also known as a porphyrin to which an iron atom is attached. There are four iron atoms that bind four oxygen atoms and transport them to tissues.
<span>the simplest sugars are generally called monosaccharides.
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Yes, I think the cell theory is a scientific theory because its statements are testable and verifiable.
<h3>What is a scientific theory?</h3>
A scientific theory is a well-sustained statement based on different types of scientific evidence.
A scientific theory must be testable, which means that it can be confirmed or rejected by using the scientific method.
In conclusion, the cell theory meets the definition of a scientific theory because it is testable and verifiable.
Learn more about scientific theories here:
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