Why is type O negative blood considered the universal red blood cell donor?

Type O-negative blood does not have any antigens (so yes, it lacks all 3). It is called the "universal donor" type because it is compatible with any blood type

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[ answer ]

foliated

[ explanation ]

foliation forms in a rock when pressure squeezes the rock together. the rock then has a design of many different color little lines. there are three types of foliated rock. the types are slate, schist, and gneiss. each type of foliated rock is different based on grain size and foliation characteristics. the lines appear when the rock has been under pressure.

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