1. Genetics: Study of heredity and variation 2. Molecular biology: Study of the structure and function of molecules involved in biological processes 3. Cell biology: Study of the structure and function of cells, the basic units of life 4. Developmental biology: Study of how organisms grow and develop from a single-celled zygote 5. Evolutionary biology: Study of the evolution of life forms over time 6. Ecology: Study of the interactions between organisms and their environment 7. Physiology: Study of the function of living organisms and their component parts 8. Microbiology: Study of microorganisms, such as bacteria, viruses, and fungi 9. Neurobiology: Study of the structure and function of the nervous system 10. Immunology: Study of the immune system, which protects organisms from infection