It takes about one minute for a blood cell to make a complete circuit of the human body.
<span>Metamorphic rocks form by existing rocks join together under high heat and pressure. Examples of metamorphic rocks are marble, schist, slate, and quartzite. Metamorphic rocks formed when the minerals are chemically changed due to heat and pressure. They are often seen near magma but they do not melt like igneous rock.</span>
That would be C
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Answer: possibly A
Explanation: B an C are not it because they are more like mutations. D humans don’t always become immune.
