nucleus is the most fundamental unit of life according to the cell theory.
nucleus is the most fundamental unit of life according to the cell theory.
what is the most fundamental unit of life according to the cell theory?
nucleus
in biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells. cells are the basic unit of structure in all organisms and also the basic unit of reproduction. with continual improvements made to microscopes over time, magnification technology advanced enough to discover cells in the 17th century. this discovery is largely attributed to robert hooke, and began the scientific study of cells, also known as cell biology. over a century later, many debates about cells began amongst scientists. most of these debates involved the nature of cellular regeneration, and the idea of cells as a fundamental unit of life. cell theory was eventually formulated in 1839. this is usually credited to matthias schleiden and theodor schwann. however, many other scientists like rudolf virchow contributed to the theory. it was an important step in the movement away from spontaneous generation.
cell theory
in algebraic number theory, a fundamental unit is a generator (modulo the roots of unity) for the unit group of the ring of integers of a number field, when that group has rank 1 (i.e. when the unit group modulo its torsion subgroup is infinite cyclic). dirichlet's unit theorem shows that the unit group has rank 1 exactly when the number field is a real quadratic field, a complex cubic field, or a totally imaginary quartic field. when the unit group has rank ≥ 1, a basis of it modulo its torsion is called a fundamental system of units. some authors use the term fundamental unit to mean any element of a fundamental system of units, not restricting to the case of rank 1 (e.g. ).
fundamental unit (number theory)