Miss Estruch | Biology Teacher, Resources & CPD on Instagram: "Required Practical 12 is one of the most tested biology practicals — distribution, abundance, transects, abiotic factors, and stats all in one.⁠ ⁠ In this investigation, you explore how a species (like daisies) changes across a gradient such as light intensity or soil moisture. You’ll collect data using a quadrat, measure your abiotic factor, and analyse your results using a correlation test like Spearman’s rank.⁠ ⁠ If you want a cle