It's mere extrapolation from the fact that mucus blocks the tubes between the pancreas for example and the intestines when enzymes are passed through them. This was confirmed by a senior biology teacher at my school.
My school said that they were going to contact Edexcel and ask them to remove it as it wasnt in the syllabus. If enough people contact them, they will remove it.
oh ok thanks , i think my school contacted edexcel to remove it too which is good
Hey im doin the same exam and im in year nine, anyone mind sending me some of the high mark answers😁😁
Just learn three examples of mutualism, go over blood glucose regulation, eutrophication, pH, punnett squares (remember Hunttigton's disease is caused by a dominant allele). Why has smoking been reduced? why does CF increase infertility. Don't waste time on Nitrogen or carbon cycle.
It was quite easy but the mutualism question just went out of my head completely. I knew about the plant and bacteria but the others went out of my head.