Why don't the mother and fetus's blood mix? The fetus can give the mother a disease Hormones from the mother would interfere with the fetus's cellular processes The fetus's digestive system would prevent the blood from mixing The mother's immune system would detect the fetus as an invader

the index of refraction of the second medium is higher. i just took the test trust me !

the atomic number of magnesium is 12. its nucleus must contain 12 protons and no electrons. the atomic number of an atom is determined by the number of protons.

magnesium is an electrolyte injection commonly used to treat low magnesium levels in your blood. it is also used to prevent or control seizures in women with preeclampsia or eclampsia.

the circled areas are referred to   as sunspots.   the sunspots are cooler than the   surrounding area.

sunspots are temporary phenomena on the photosphere of the sun that appear visibly as dark spots compared to surrounding regions. they correspond to concentrations of magnetic field flux that inhibit convection and result in reduced surface temperature compared to the surrounding photosphere.