| A | B |
| Biology | The study of life |
| Botany | The study of plants |
| Zoology | The study of animals |
| Ornithology | The study of birds |
| Mammalogy | Animals that have hair |
| Physiology | The study of how organisms function |
| Ichthyology | Study of fishes |
| Pathology | The study of diseases |
| Genetics | The study of how we inherit traits |
| Taxonomy | The study of how organisms are classified |
| Histology | The study of tissues |
| Cytology | The study of cells |
| Anatomy | The study of structure |
| Evolution | The study of how organisms change over time |
| Entomology | The study of insects |
| Herpetology | The study of snakes and lizards |
| Helminthology | The study of worms |
| Paleontology | The study of fossils |
| Malacology | The study of shelled organims like clams and snails |
| Pharmacology | The study of drugs |
| Mycology | The study of molds and fungi |
| Virology | The study of viruses |
| Bacteriology | The study of bacteria |
| Parasitology | The study of organisms which do harm to man |
| Ecology | The study of the relationship between organisms and their environment |