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Factorising x²-100: As there is no common element in x² or 100, we know this must consist of two sets of brackets not just one. we know both brackets must contain and x, and that whi...

Regions of an organism's genome that code for proteins are known as genes. The sequence of deoxyribonucleic acids (bases) in a gene directly translates to the sequence of amino acids in the protein it enc...

A personal statement is much like the cover letter of a CV; it's a small piece of introductory writing at the top of a CV that is personalised to the position you are applying for. This means that, for th...

-acid in the stomach kills any pathogens-skin acts as a physical barrier to pathogens-hair in the nose and ears trap any pathogens -saliva & mucous trap pathogens. The bronchi have villi that help mov...

The question wants us to confirm the answer so the marks will be in the method unlike most questions which require you to find the answer. How to approach this is by thinking what ways can we calculate ar...