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What are the key principles of evolution?

Variation: there is variation in the physical and behavioural characteristics of a set of organisms. This variation is caused by a combination of genetic and environmental factors.

IS
Answered by Ivan S. Biology tutor
5486 Views

How can I learn my oral presentation by heart?

So, you've written a great presentation for your oral exam but (like most of us!) you're terrified of messing up on the day. The best way to be sure of delivering a presentation to the best of your abi...

RL
Answered by Rowan L. French tutor
10604 Views

What is the central moment of Aeschylus' Agamemnon?

The central moment in Aeschylus' Agamemnon is when the eponymous hero arrives home and walks over the purple tapestries. This is central to the main theme of justice in the play. The act of walking ove...

ZC
3474 Views

Given that 5cos^2(x) - cos(x) = sin^2(x), find the possible values of cos(x) using a suitable quadratic equation.

First, need to get all the terms in the equation to be the same. Using the following identity, it is possible to achieve this:

sin2(x) + cos2(x) = 1

1 ...

AB
Answered by Andrew B. Maths tutor
8718 Views

How do I plan and structure an essay in an exam?

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