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The proportion of the population with genotype Bb can be calculated using the two equations of the Hardy-Weinberg principle. These equations are: p + q = 1  where: p = frequency of the do...

A pure public good is a good that is consumed collectively; it is both non-excludable and non-rivalrous. These two main characteristics mean that people can't be stopped from consuming the good, and that ...

The primary ingredient for a volcano is magma. Magma is what we call melted rock. When rocks melt at depth they become less dense than the solid rocks around them and therefore they rise to the surface of...

DNA is made of small subunits called bases that join together to form a long chain. The bases in each chain join to the bases in another chain to form a structure that looks a bit like a ...

The heart is an organ made of muscle in the centre of the chest. It's role is to pump oxygenated blood around the body to enable our functions to be carried out. During a heart attack, a section of the he...