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Why is sickle cell disease most common among people living in tropical regions, and their descendants?

Sickle cell disease is caused by a recessive allele of the haemoglobin gene. When two copies are present (i.e. it is homozygous), many red blood cells become sickle-shaped, leading to disease. However, if on...
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Answered by Sean G. Biology tutor
18720 Views

Differentiate x^5 + 3x^2 - 17 with respect to x

When you are differentiating, use the formula: The differential of ax^n is (n*a) x^(n-1). Or in words: 'multiply by the power, then reduce the power by 1.' Hence for our question, x^5 differentiates to 5x^(5...
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Answered by David L. Maths tutor
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What Is straight line depreciation?

In financial accounting we have different types of depreciation, based on the company's accounting policy. One of the methods is straight line depreciation. Assets can be depreciated, so losing thier value i...
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Answered by Ignac S. Accounting tutor
2352 Views

What is Levi Strauss' Theory of Binary Opposites?

Levi Strauss, a French anthropologist in the 1900s, proposed a theory of 'binary opposites' which entails that the majority of narratives in media forms such as books and film contain opposing main character...
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182659 Views

I'm find the text really difficult to understand, how can I make it easier?

Lots of texts can be intimidating, (and some a bit dry!) so the best way to understand a challenging text is to experience the story before you read it. The best way to do this is to read introductions and c...
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