Which statement best describes how a B-cell works? It produces antigens, which stimulate a fever.
It produces antibodies specific to an antigen.
It produces antigens specific to antibodies.
It produces antibodies, which stimulate a fever.

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

What is the atomic mass of an atom that has 6 protons, 6 neutrons, and 6 electrons? a) 6 b) 8 c) + 1 d) 12 e) 18

What must occur for air masses to form fronts