Dear Dalia, Thanks for mentioning the two matching multichoice answers. I have updated this test and the markscheme and added a different response for D in question 4 as you suggested.Best wishes, David
C1.3 Photosynthesis - model answerDear Kealy, I hope you are well. I have just added some model answers to this page. You can find the link in the left hand navigation. Best wishes, David
Stability ecosystems & mesocosms (2025)Dear Eugene, Thanks for your message. I have redirected the link to the matching model answers D3.3 Homeostasis. Best wishes, David
D3.3 Homeostasis - Planning sheetDear Teresa, Thanks for your question, the model answers for the Data analysis can be found here: https://thinkib.net/biology/page/67497/epidemiology-model-answers...
Epidemiology - a heart study (2025)Dear Natalie, I have just posted model answers for the epidemiological data worksheet, activity 2. Best wishes, David
Epidemiology - a heart study (2025)Yes, could you please post the model answers? Thank you so much.
The endocrine system (2025)And again! Can we please have access to the model answers for the IB style epidemiological question? Thank you.
Epidemiology - a heart study (2025)Hello could you please post the model answers for the Control of Transcription? Thank you so much
Transcription - extras for HL (2025)
Lucinda
Q8: since combustion of wood and forest is not a flux shown, my students used the total inputs to the atmosphere (156.1Gt) and outputs (154.0Gt) to find the missing input value = 2.1Gt. This seems a better answer than that 2Gt is less than 6Gt for...
Carbon cycle IB style questions - model answers (2025)