Year 11 Biology Preliminary Exam

Biology Preliminary exam (75 marks)  Multiple Choice (5 marks) Question 1. Sucrose is dissolved in water and poured into dialysis tubing which is closed on both ends making it water tight, if it is then placed in deionised water, what will happen to the tubing. a) It will expand since the solution is hypotonic toContinue reading “Year 11 Biology Preliminary Exam”

Surface Area to Volume Ratio

Learn. The surface area to volume ratio (SA:V) is one of the underlying themes throughout biology. It explains why cells are as small as they are, why we developed systems to deliver food and oxygen to our cells, why some animals are large and thin whilst others are fat and small. The process of diffusionContinue reading “Surface Area to Volume Ratio”