AP BIOLOGY

Detailed explanation-1: -Reduction is the gain of electrons, loss of oxygen or gain of hydrogen. These examples show how to explain oxidation and reduction. Often you can explain it in terms of change in oxygen content or hydrogen content but sometimes an explanation in terms of electrons is required.

Detailed explanation-2: -The gain of the electrons is known as reduction, whereas the loss of electrons is known as oxidation. Generally, one atom loses the electron (s) and gets oxidized, which electron is then gained by another atom to get reduced. Hence, both the processes occur hand-in-hand and such reactions are known as redox reactions.

Detailed explanation-3: -Reduction is the addition of electrons to an atom/ion, whereas, oxidation is the removal of electrons from an atom/ion.