Top answers

Biology
GCSE

Why does cholesterol need to be reduced and how do statins do this?

-High levels of cholesterol (especially LDL's, the 'bad' type) clog the arteries with a thick fatty substance

-This causes narrowing of the coronary arteries (which carry blood to the heart)

Answered by Isobel P. Biology tutor
2337 Views

Identify 3 different antibiotics and describe how they work.

Antibiotics are important for treating bacterial infections that may be making us ill. There are many different antibiotics that work in different ways, and therefore they are suitable for treating differ...

Answered by Madeleine H. Biology tutor
2794 Views

What is the difference between mitosis and meiosis?

Mitosis is the production of two genetically identical diploid daughter cells in one division while meiosis is the formation of four genetically different haploid daughter cells in two divisions. Mitosis ...

Answered by Oskar D. Biology tutor
3252 Views

"Hormones are secreted by endocrine glands." Explain the meaning of this statement.

Firstly, lets define each of the important scientific words here. Hormones are chemical messengers in the body which aid in the chemical coordination of different functions, for example, related to homeos...

Answered by Adam H. Biology tutor
6397 Views

How does vaccination prevent infection?

White blood cells produce antibodies which are produced rapidly upon re-infection and these antibodies kill pathogens.

Answered by Ruqia A. Biology tutor
2233 Views

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