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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...
ER
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)
TL
Answered by Tristan L. • Maths tutor
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How should I approach unseen poems in exam questions?

I find it helpful to start with the 'big picture', and then slowly zoom in until your studying the language at a micro level. Here are some things you could look at as you zoom in: What is the context of thi...
TD
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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
10229 Views

Differentiate with respect to x: w=4x^2 + 3sin(2x)

We will split this up and differentiate each part separately. We can differentiate 4x 2 using our normal rules for differentiating; we multiply the coefficient by the power and then subtract one from the pow...
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Answered by Emma M. • Maths tutor
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