(C2.1) - Chemical Signalling - IB Biology (HL)

[@yaknowit._.o]

You explain things really well and fun, thanks.

[@eliottking99]

Thanks so much i have a test on cell signalling tomorrow and this was so helpfull, thank god you made this video.

[@niteusga]

Thanks a lot! cramming for a bio test that I have tommorw. has helped a lot so far :)

[@tabella5233]

You really help a lot😭.
Thank you🌟