This simple cartoon shows general similarities and differences between eukaryote and prokaryote cells.
Image courtesy of Windows to the Universe
Biology is the study of life
and living organisms. Biologists study the structure of organisms
, how they grow, their evolution
and function in the environment, and their distribution and relation to other species
. Biologists study life at a wide range of scales, from the microscopic, cellular level to the scale of organisms and ecosystems
Because all substances are made of chemicals, a biologist must understand chemistry to be able to understand life. Similarly, because life in the Earth system - the biosphere - interacts with the other parts of the Earth system (such as the atmosphere, hydrosphere, and geosphere), many geologists must understand biology. Biogeochemists specialize in the study of the interactions between life and the Earth system.
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