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The coronary arteries supply the blood to the tissues of the heart, which is made up of cells called myocytes. In the body, the heart acts like a pump and contracts in order to force blood out into the re...

Use key words and ensure you are specific in what you are saying. Try and avoid writing in long sentences, use bullet points if you can. Diagrams are also helpful for the examiner to understand your answe...

Nucleotides make up DNA. Nucleotides themselves are made up of a phosphate, sugar and base.

They bases are: Adenine (A), Thymine (T), Cytosine (C), Guanosine (G). 

A is bonded to T. C is bon...

Cell division occurs through a process called mitosis where a mother cell splits in two to form daughter cells identical to that of the mother. The stages of mitosis are prophase, metaphase, anaphase, tel...

Eutrophication is a negative impact of the use of fertilisers on aquatic lifeforms. When nutrients from fertilisers (eg nitrate and phosphates) leach from farm fields into the water, this allows fast-grow...