Lucinda Thank you, I see your point. The terminology is rather loose on this point (each chromosome consists of two elongated DNA molecules (chromatids) held together until anaphase.). As it is the ms rather thsn the question it could...
Mitosis IB style questions - model answersDoes anyone else find the use of 'double stranded' and 'single stranded' chromosomes in parts c and d confusing for students? I spend a lot of time reminding them that a single molecule of DNA is always double stranded (double helix)? Would...
Mitosis IB style questions - model answersDear Sudarshan, Thanks for your comment. The SAPS website is a real treasure trove of plant based experiment ideas.The site has been restructured recently. I've updated the link, and added a link to the very useful teachers notes as well.Best...
Limiting factors and experiments (2025)good morning, the link became inactive
Limiting factors and experiments (2025)Dear Lucinda, Thanks so much for spotting this. I have corrected "meiosis" into "mitosis" and added a little extra detail to clarify this point further.Best wishes, David
D2.1 Cell and nuclear division - planning sheetSame question...
Collecting osmosis dataWhere are the model answers? thank you!
B2.1 Membranes & transport - topic testAn important TYPO in the revealed paragraph for meiosis where it says meiosis produces identical nuclei
D2.1 Cell and nuclear division - planning sheetReplication is happening in the S-phase of Interphase, before Mitosis and Meiosis.
Mock exam - paper 1a HL - Model answers
Kevin
Can a student test the effectiveness of spices on kefir growth? They want to culture kefir on a plate is measure the zones of inhibition. I am not clear if culturing kefir is within the bounds. Please advise. Thank you
30 investigation ideas for Biology IA