The things you see in our job cursor, a plant, and a microscope, belong to a biologist, a scientist who studies living organisms in nature, their interactions with each other and the environment, and the processes that govern life. Biologists can specialize in various fields, including molecular biology, ecology, genetics, physiology, etc. They use different scientific methods and techniques to research and study living organisms at all levels of the organization, from molecular and cellular biology to whole ecosystems.