There isn't a single, universally accepted list of six major divisions of biological science. The field is vast and complex, with many overlapping areas of study. However, a common way to broadly categorize biology is to look at the levels of organization:

1. Molecular Biology: Focuses on the structure and function of molecules essential to life, like DNA, RNA, and proteins.

2. Cellular Biology: Examines the basic unit of life, the cell, including its structure, organelles, and processes.

3. Genetics: Studies how genes are passed down, expressed, and influence traits, including mutations and heredity.

4. Evolutionary Biology: Investigates the origin and diversification of life on Earth, including natural selection and adaptation.

5. Ecology: Explores the interactions between organisms and their environment, including populations, communities, and ecosystems.

6. Organismal Biology: Covers the study of individual organisms, their structure, physiology, behavior, and development.

These six areas encompass many different fields of biology, and some would argue that areas like Biochemistry, Biophysics, Developmental Biology, or Neuroscience should also be considered major divisions. Ultimately, the best way to categorize biology depends on the specific context and the level of detail you're exploring.