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Scientists have come up with many different definitions of a species over the years; reproductive isolation being key to all concepts. However the most widely accepted is the biological species concept: '...

Sources of genetic variation consist of random fertilisation and mutation. Mutation is a product of mistakes made during DNA replication. There are two main types of mutation; point gene mutation and c...

Verbs of motion are one of the most complex aspects of Russian grammar and can be very difficult to get your head around. 

First and foremost, it is essential to remember that whilst most...

The simple answer to this question is to practice, practice, practice! Find a poetry anthology in your library that you can photocopy, or print out some online poetry (the poetry found...

Although other factors contributed greatly the the spread of American civilisation across the Plains, the railroads were incredibly significant for three main reasons:
1. The rai...