Gravesend Grammar School,
West Thames College,
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Exam Revision support for A level Biology Students
Sample Biology StudyRoom article
Biology StudyRoom article looking at Gas Exchange
A small organism, like an amoeba, has a large surface area : volume ratio, and so it can accomplish all the exchange it needs by simple diffusion across its body surface. However, a large organism, like a mammal, has a much smaller surface area: volume ratio, so it can not accomplish all the exchange it needs in this way. A large surface area : volume ratio is preferable for carrying out exchange...
Biology PodTutor Track - Biochemistry and Cells - Enzymes
Download and listen to our unique mp3 PodTutor audio revision resources, and revise whenever and where ever you like. Ideal for students who have a strong auditory memory and therefore find information sticks if they hear it rather than read it, PodTutor is also suitable for students with Dyslexia, impaired vision or student for whom English is a second language...
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