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There are two main mechanisms that contribute towards the process of speciation: natural selection, and genetic drift. The result of both of these mechanisms is phenotypic and genetic change as a populati...

When there is a government budget deficit it means that the government spending is greater than the government revenue, hence there is more money being channeled into the economy. This money can be used t...

First of all, don't panic! You may think that you didn't understand the whole piece, but are there any parts you did understand? Look at the possible answers if it's multiple choice and apply the process ...

In response to high blood glucose concentrations, insulin is released from the pancreas into the blood. Insulin acts on cells (especially liver cells) and causes glucose to move from the blood into these ...

First, show how to multiply out two brackets, and the structure of such a question.When given a quadratic, such as x^2 + 4x - 32 (x+8)(x-4)to solve this, first making a list of factor...