1. Fertilisation and Sperm Adaptations – Explaining the role of the cortical reaction in preventing polyspermy and the significance of mitochondria in sperm motility.

2. Vascular Tissue in Plants – Calculating magnification of sieve tube elements and explaining structural differences between sieve tube elements and companion cells.

3. Nutrient Transport in Plants – Investigating the movement of nitrate ions from roots to leaves and the effects of magnesium deficiency on plant health.

4. Microbial Growth and Aseptic Techniques – Describing aseptic methods for working with bacteria and explaining conditions that promote bacterial infections in wounds.

5. Egg Cell Size and Reproductive Strategies – Comparing egg cell sizes across species and analyzing how environmental factors influence egg size and development.

6. Seed Banks and Genetic Conservation – Evaluating the importance of seed banks in preserving biodiversity and assessing factors affecting seed longevity and germination success.