Google: <span>The female reproductive system has two functions: The first is to produce egg cells, and the second is to protect and nourish the offspring until birth. The male reproductive system has one function, and it is to produce and deposit sperm.</span>
They use a formula and that formula is
People/Land Area=Population Density
Answer:
it's called taxonomy or binomial nomenclature
the first name is generic (from genus) and begins with a capital letter
the second name is specific (from species) and begins with a small letter
Cell is highly concentrated compared to blood