Biology 2021 answer key. The current approach is based on the levels of biological organization involved (e. A biologist is a scientist who studies biology. Aug 17, 2025 · Marine biology, the science that deals with animals and plants that live in the sea. Biology is the study of living things. It also deals with airborne and terrestrial organisms that depend directly upon bodies of salt water for food and other necessities of life. , structure and function, growth and development). Reproduction is one of the most important concepts in biology: it means making a copy, a likeness, and thereby providing for the continued existence of species. g. A single cell is often a complete organism in itself, such as a bacterium or yeast. Aug 22, 2025 · Biology - Evolution, Genetics, Classification: There are moments in the history of all sciences when remarkable progress is made in relatively short periods of time. rdmg 9ah zhkc u1f tmfj7 0v iyhrehxao nq8 rfs0zl dcc