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A substance which increases the rate of a reaction without being consumed

Atherosclerosis occurs as a result of damage to the endothelial lining of blood vessels. Once the damage has occurred, the body induces an inflammatory response, causing ...

Starch molecules are insoluble and therefore don't affect the water potentialThey are also large and therefore can't leave the cellThey are compact and c...

A macrophage attaches to a pathogen by the receptors on the pathogen and macrophage binding. The pathogen is then engulfed and a phagosome forms, where a vesicle surrounds the pathogen. A lysosome moves t...

Variation is present in a population, this can either be genetic variation or due to mutations. A selectional pressure causes a stuggle for existance. Selectional pressures can come from a predator, disea...