The WHOLE of ENERGY AND ECOSYSTEMS AQA A-Level Biology (Plus Exam Practice) 

Thank you so much

bros underrated fr

I love your videos! You explain things so well thank you!

I enjoy seeing your enthusiasm for the subject as you teach it, it makes revision seem less dull and daunting. Thanks sir :)

Sir you are amazing! Completely underrated, your videos help me so much! Massive thank you. :)

great video but doesnt include nitrogen and phosporus cycle or eutrphication

i just love ur biology

Im not sure if you noticed but at around 28:40 you said that GPP = NPP - R but its the other way round and the question asked for NPP

Thank you so much these videos are so helpful! would you be able to make past paper walkthroughs please ?

28 minutes in. i thought it was NPP=GPP-R. therefore NPP+R would be GPP. am i wrong?

Pls do this for all advanced topics esp the hard DNA related ones at the end of y13!! Thanks

Thanks for the videos, I haven’t started my revision yet and my exams start in less than 3 weeks 😭

is this paper 1 or paper 2 content?

class video😃