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How Long Did It Take the Human Population to Double

question 173

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How long did it take the human population to double from 500 million to 1 billion?


Definitions:

Neutrophils

A type of white blood cell important in the body's defense against infection by engulfing and destroying pathogens.

Hematocrit

The ratio of the volume of red blood cells to the total volume of blood, expressed as a percentage.

Red Blood Cells

Disc-shaped cells essential for transporting oxygen throughout the body using a protein called hemoglobin.

Universal Donor

Refers to a person with O negative blood type, whose blood can be transfused into persons of any other blood type in emergency situations.

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