1. Plant Reproduction and Pollination: Self-pollination in apple trees, pollen tube growth, seed development, differences between insect-pollinated and wind-pollinated flowers, and the role of fruit in seed dispersal.

2. Circulatory System and Heart Function: Structure of the heart, differences in coronary artery and vein blood composition, left vs. right ventricle thickness, risk factors for coronary heart disease, and prevention measures.

3. Nutrition and Digestion: Comparison of oat and almond milk for weight loss, reasons for non-dairy milk consumption, glucose testing in milk, and immune protection from breast milk proteins.

4. Genetics and Evolution: Karyotype analysis in humans, cell division types, Turner syndrome effects, environmental influence on moth color variation, and data analysis of genetic changes in populations.

5. Osmosis and Experimental Biology: Investigating osmosis in potato tissue, effect of sucrose concentration on mass change, calculation of surface area impact, and analysis of percentage length change in osmosis experiments.

6. Ecology and Food Webs: Energy transfer in trophic levels, primary consumers, efficiency of energy flow, measuring plant population sizes, predator-prey relationships, and the ecological role of wild dogs in selecting weaker prey.