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Explain how meiosis promotes genetic diversity

Meiosis occurs to produce haploid gametes required for sexual reproduction. It promotes genetic diversity in 3 different ways: crossing over, independent assortment and random fertilisation.Crossing over occ...
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Answered by James A. • Biology tutor
8196 Views

How far do you agree that the Heath government was unsuccessful because of circumstances out of its control?

One argument in favour of Heath’s governments failure being down to unpopular policies was the Industrial Relations Act of 1971. Heath wanted to curb the power of the unions by introducing measures that woul...
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Answered by Billy T. • History tutor
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Describe how different types of blood vessel are structurally adapted for their purpose.

Arteries , carrying blood away from the heart have a thick muscular wall that is more elastic than fibrous tissues. This is elastic to cope with the high fluid pressure in the lumen and allows distention and...
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Answered by Digby H. • Biology tutor
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How do I improve my history essay writing skills for a source-based question so that I am able to achieve the top band/level?

Firstly, planning and structure are very much key to your success in a history exam. Ensure that before you begin writing your exam response for a source-based question you have a clear argument in your head...
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Answered by Hyacinth H. • History tutor
3561 Views

How does the lock and key mechanism help enzymes to increase the rate of substrate reactions in the body?

Enzymes are proteins that typically help to increase the rate of specific reactions in the body, each enzyme is specific to one or two substrates meaning that different enzymes help to increase the rate of d...
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Answered by Sophie W. • Biology tutor
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