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Explain Darwins theory of evolution by natural selection (5 marks)

A mutation will randomly occur in individuals within a species, providing a larger variation in genes. This mutated gene may produce characteristics which are beneficial for the individual in their environme...
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Answered by Elisha R. • Biology tutor
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Algebraic fractions

9/3x 2 - 3y 2 + x/xy - x 2 = 9/3(x 2 -y 2 ) + x/x(y-x) = 3/(x-y)(x+y) + 1/y-x = 3/(x-y)(x+y) - 1/x-y = 3-1(x+y)/(x-y)(x+y) = 3-x-y/(x-y)(x+y)
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Answered by Tristan L. • Maths tutor
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How do interest rate changes affect economic growth?

A cut in the base rate (rate at which the central bank lends to commercial banks) generally increases growth, and an increase in rates reduces growth. This is due to several factors: Impact on consumers - a ...
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Answered by Pravin S. • Economics tutor
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A bag contains red discs, white discs and blue discs. 1/6 of the discs are red, 1/4 of the discs are blue. What is the smallest possible number of white discs?

We are given the fractions representing the number of discs in the bag. When comparing fractions, we should first find a common denomenator for them. The smallest common denomenator for 6 and 4 is 12 (4 3=12...
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Answered by Grimonia C. • Maths tutor
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How do I approach analysing a poem?

When you're first given a poem, you may feel that you could never have enough to say to write an essay on it. However, by splitting your preparation into sections and reading it through specifically looking ...
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Answered by Sian H. • English tutor
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