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What is the difference between communicable and non-communicable diseases

Looking at the word communicable you may notice that it sounds similar to the word communicate, which is exactly what it means. A communicable disease is one which can communicate to other living organisms i...
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Answered by Omehra M. • Biology tutor
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A scientist is researching the effect of an energy drink on a group of twenty men. State two characteristics of the sample which may influence the results.

So this question is looking at how characteristics of different people may affect how they respond to an energy drink. A good way to start thinking about this question is to think about what makes the people...
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Answered by Amy B. • Biology tutor
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What are the main differences between mitosis and meiosis?

Mitosis and meiosis are both examples of cell division that result in the creation of new cells. There are two main differences between these processes; firstly, meiosis involves two cell divisions and mitos...
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Answered by Bryonie O. • Biology tutor
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What is DNA made 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 ladder, with each ch...
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Answered by Ben N. • Biology tutor
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Please can you explain what a heart attack is and how it can occur?

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 heart...
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Answered by Vijay G. • Biology tutor
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