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What is speciation? Give an example of when speciation may occur.

Speciation is the formation of a new species that cannot interbreed with other species to produce fertile offspring. It may occur due to geographical isolation, such as the formation of a river separating th...
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Answered by Emily B. • Biology tutor
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A graph is given with a plot of y = sin(x) for 0 <= x <= 360. Which value of x in the range 90 <= x <= 180 satisfies sin(x) = sin(30)?

x = 150.This question requires that the student uses the symmetry of the sine graph. If we draw y = sin(30) on top of y = sin(x), it is clear that a possible value of x is 150. A harder question could use a ...
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Answered by Jake S. • Maths tutor
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A right angled triangle has two smaller sides length 3 and 4, what is the length of its longest side?

As we are told it is a right angled triangle we known that we can use Pythagoras's formula of c 2 = a 2 +b 2 given that we have been given lengths of 3 and 4 we simply substitute these into the equation c 2 ...
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Answered by Benjamin G. • Maths tutor
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What is the effect of personification in poetry?

Personification allows a poet to convey human emotion/ experience in inanimate objects. There are various reasons a poet may do this including visual imagery, sensationalism and tonal effect.
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Answered by Mark W. • English tutor
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What are the roles of different physical processes in the formation of the meander

A river meander is a bend in a river channel. It usually occurs in the middle and lower course of a river where the land is flat and lateral erosion dominates. The main physical processes that cause the form...
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