In this video, I explain ALL of the content required for the "Energy and Ecosystems" section for AQA A Level Biology (A2). This includes: how biomass is measured, energy loss + efficiency through food chains, gross primary production, net primary production, net production and productivity.

The content crosses over with other exam boards too!

I also go through a few exam questions and explain the mark schemes.

Please comment if you have any questions, I'll be more than happy to answer them!! :)