Biology WBI16/01 June 2023

Edexcel IAS/IAL Biology (WBI) Jun 2023

معلم موافق رایگان بودن است.

1. onion root mitosis analysis—cell X phase identification, experiment design to measure mitotic index under caffeine treatment, cellulose structure description

2. ecological fieldwork—cactus-mimosa association study, quadrat sampling, odds ratio calculation, abiotic soil variables (e.g., moisture, pH), t-test statistical inference

3. fruit fly experiment—effect of pyrethrum on pupation, null hypothesis, mean calculation, graph plotting with variability, t-value and significance analysis

4. antibacterial investigation—Piper betle leaf extract testing, preliminary work for quantitative zone inhibition, controlled variable method planning, data presentation, method limitations

5. practical biology skills—microscopy, bacterial growth quantification, field experiment design, hypothesis testing, data table construction, graphical representation with error bars

6. statistical application—use of odds ratio, t-test, degrees of freedom, confidence level (p = 0.05), critical value referencing for hypothesis acceptance/rejection