As an entry-level biologist, your duties and responsibilities vary depending on the setting in which you work. In a research setting, you study plants, animals, or other organisms to gain an understanding of their characteristics and how they interact with their habitats. You perform laboratory work, primarily if you study organisms at a microscopic level. Entry-level biology professionals also work in the field, especially when studying large-scale, or macroscopic, issues such as the environment. Some biologists work in research and development for companies, while others work for regulators and government agencies.