4. At the conclusion of experiments involving growing bacterial cultures, should be added to the plates or tubes and everything should be soaked for .

Disinfectants should be added to the plates or tube and everything should be soaked for 4–10 minutes.

Explanation:

Disinfectants are suitable in the destruction of bacteria microorganisms on a motionless surface. Disinfectants are commonly used in hospitals and other places which human beings have great contact with.

sex cells are usually half's then they find another half and make a fertilize egg

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.