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Light micrograph of a moss's leaf cells at 400X magnification. The following outline is provided as an overview of and topical guide to cell biology: . Cell biology – A branch of biology that includes study of cells regarding their physiological properties, structure, and function; the organelles they contain; interactions with their environment; and their life cycle, division, and death.
There is some scepticism among biogeographers about the usefulness of general rules. For example, J.C. Briggs, in his 1987 book Biogeography and Plate Tectonics, comments that while Willi Hennig's rules on cladistics "have generally been helpful", his progression rule is "suspect". [6]
[1] [6] Hence, there are multiple subdisciplines within biology, each defined by the nature of their research questions and the tools that they use. [7] [8] [9] Like other scientists, biologists use the scientific method to make observations, pose questions, generate hypotheses, perform experiments, and form conclusions about the world around ...
Molecular biology – study of biology and biological functions at the molecular level, with some cross over from biochemistry. Structural biology – a branch of molecular biology, biochemistry, and biophysics concerned with the molecular structure of biological macromolecules. Health sciences and human biology – biology of humans.
Cell biology (also cellular biology or cytology) is a branch of biology that studies the structure, function, and behavior of cells. [1] [2] All living organisms are made of cells. A cell is the basic unit of life that is responsible for the living and functioning of organisms. [3] Cell biology is the study of the structural and functional ...
2: 2: As with other noble gases, has no known biological role. [11] Has no known harmful role. holmium: 67: 2a: This lanthanide has no known biological roles, and is not taken up by plants. [11] There are medical uses; for example, holmium-containing nanoparticles are biocompatible and facilitate NMR imaging. [45] Some salts are known to be ...
Function can be defined in a variety of ways, [6] [7] including as adaptation, [8] as contributing to evolutionary fitness, [9] in animal behaviour, [10] and, as discussed below, also as some kind of causal role or goal in the philosophy of biology.
Xavier Bichat introduced the word tissue into the study of anatomy by 1801. [6] He was "the first to propose that tissue is a central element in human anatomy , and he considered organs as collections of often disparate tissues, rather than as entities in themselves". [ 7 ]