The answer is: "12 (twelve)" .
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Note: 24 / 2 = 12 .
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In order to produce an effective immune response within the body, the person must be injected with a dosage of a virus or bacteria, and for it to be allowed to grow in the person, which replicates just enough to stimulate a response from the immune system.
Two diverse species<span> naturally breed an offspring, and selective pressures favor </span>new<span> traits in a given environment, (they evolve). hope this helps</span>
A decomposition reaction occurs when ionic or covalent bonds are broken and elements and or ions or simpler molecules are formed.
