Edexcel IGCSE Biology Paper 2 - 11th June 2018 Discussion

It won't be anything higher than 135 because January papers are for the people who want to resit the exam, so obviously they are much more prepared for it. Also, if I am wrong, how come all other June papers have been in the range of 120-135?

what did you guys put for the last question?

It won't be anything higher than 135 because January papers are for the people who want to resit the exam, so obviously they are much more prepared for it. Also, if I am wrong, how come all other June papers have been in the range of 120-135?

For 2BR. What bird is the least likely to survive?

I said the Great Tit

Tomorrow's Biology paper ... anything to be clear about or any thoughts !?

Hi guys ! for the question on another way to measure light intensity on carbon dioxide. how many marks do you think i would get if I put use lime water in a test tube so gas bubbles through and it will go cloudy if carbon dioxide is released. put 1 test tube with a leaf in a dark room and 1 in a light room and 1 with just carbon dioxide for a control test. repeat 3x for reliability. use tongs and google for safety.





i think i got it wrong but would i get any marks out of 4 for this? please reply quickly thank youu

ummmm wasnt the experiment meant to be light intensity on photosynthesis not CO2?

As per my understanding you had to do the starch test.
I believe you get marks for: 1) Boiling in ethanol 2) Specific time period left to photosynthesise (i.e. 24hrs) 3) Iodine Solution 4) Blue-


black

Would I still get a mark or two for putting safety precautions and saying I would repeat the experiment and putting a Time limit?

By finding the CO2 levels, don't you find how light affects photosynthesis still e.g. low CO2 levels in high light intensity means photosynthesis is greater?

By finding the CO2 levels, don't you find how light affects photosynthesis still e.g. low CO2 levels in high light intensity means photosynthesis is greater?