Frequently students fail to learn the vocabulary of Biology. To get a top grade it is essential to know what the words mean in a Biological context (niche, chromosome, chromatid...), and have the confidence to use those words in an exam answer.
I recommend using www.memrise.com, it also has iOS and android apps, there are lots of glossaries to work your way through or you can write your own. It is cleverer than it looks.
Here are a couple Eduqas component 1, Eduqas component 2