When you read this column, many of you will have just completed the first year of one of the new A-level biology specifications. You have the results of your AS unit tests and you are now embarking on the A2 course. How will it be different? There is no simple answer to this, but all specifications have to show progression. You probably found that AS biology was more demanding than your GCSE course. A2 biology is likewise more demanding than AS biology. This applies to the practical work as well as to the other aspects of the course. One of the main ways in which specifications show progression in practical work is by introducing statistical tests. In this issue of BIOLOGICAL SCIENCES REVIEW we will look at why we use statistical tests.
At almost any time of the year and almost anywhere in the UK, you can see blackbirds. Look at the photographs in Figure 1 and you will see that there are obvious differences between male and female birds.
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