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This is a good candidate for integration by parts because it is a product of two functions – ln(x) and x^3, and x^3 is easy to integrate. The definition for integration by parts is: integral(u dv/dx) d...

Restriction enzymes cut at specific sequences named palindromic sequences. These are unique as they read the same in opposite directions. A specific palindromic sequence is complementary to a specific res...

There are a number of ways to evaluate a source, and by using a range of these you can get an excellent idea of whether it is reliable or not.

When was it written?- Often public opinion on certain ...

The best way to start with this kind of analysis, particularly with unseen poetry is to read through the poem carefully and get a general feel for how it makes YOU feel. Does it make you feel happy or sad...

It is important to have balance in your evaluation, so don't just focus exclusively on negative evaluation points, try and include a range of points. For example, one major positive evaluation point for b...