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First take the 3 over the other side to make the right hand side zero, turning it into a homogeneous equation: 3a2+4a-2=0. Since the expression on the left hand side cannot be factorised, we ha...
Example of an extract question for Othello: “Read the extract below and then answer the question. Explore the significance of this extract in relation to the tragedy of the play as a whole. rememb...
According to Darwin's theory, genetic variation within the population means that some elephants are born with longer noses. Longer noses are better suited to the environment, so longer-nosed elephants are...
A homologous series is a group of compounds that share the same functionl group. Members of the same series have similar chemical properties and show a gradation in physical properties. E...
Mutation, meiosis and sexual reproduction causes variation amoung members of the same species. Species tend to produce more offspring than the environment can support leading to competition for food or pr...
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