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Genetic drift is any change to the gene pool of a population (the total set of genes they have as a group) that is NOT a caused by selection. They can be thought of as 'random' changes, unlike natural sel...

As this is an isolated container, we know that the heat transfer with the environment is zero. Since the specific latent heat of ice is a magnitude bigger than the specific heat of water, the container wi...

Trotsky’s responsibility in achieving victory for the Red Army in the Civil War was not rivalled by the role of any other individual. By having absolute control of the Red Army, Trotsky was responsible fo...

Respiration can be broken down into 'aerobic' and 'anaerobic' respiration. Aerobic respiration needs oxygen to be carried out, whereas anaerobic respiration takes place without oxygen. Glucose is broken d...

The period of the purges (1936-38) involved the widespread surveillance, imprisonment, and execution of ‘counter-revolutionaries’. This was often used as a smokescreen for Stalin to kill his personal poli...