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PLUPERFECT
Used to describe an action or event that had taken place before some other event in the past
How to form it:
Auxiliary ver...
Venous blood enters the heart through the vena cava, it drains into the right atrium. The blood then flows through the tricuspid valve into the right ventricle. When the heart contracts the blood is eject...
Both aerobic and anaerobic respiration begin with glycolysis, which is the splitting of the 6 carbon glucose into 2, 3 carbon pyruvate molecules. This happens because glucose cannot be used directly by ce...
Hydrogen bonding is a strong dipole-dipole attraction between a lone pair of electrons on a highly electronegative atom, such as oxygen or nitrogen, and a hydrogen atom on another molecule. In the case of...
Antibodies are proteins which belong to a class known as immunoglobulins. They are made up of chains of amino acids joined by peptide bonds. Antibodies have an important role in the immune system of many ...
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