Cell theory states that the cell is the fundamental unit of life, that all living things are composed of one or more cells, and that all cells arise from pre-existing cells through cell division. In multicellular organisms, every cell in the organism's body derives ultimately from a single cell in a fertilized egg. The cell is also considered to be the basic unit in many pathological processes. In addition, the phenomenon of energy flow occurs in cells in processes that are part of the function known as metabolism. Finally, cells contain hereditary information (DNA), which is passed from cell to cell during cell division. Research into the origin of life, abiogenesis, amounts to an attempt to discover the origin of the first cells.

A central organizing concept in biology is that life changes and develops through evolution, and that all life-forms known have a common origin. The theory of evolution postulates that all organisms on the Earth, both living and extinct, have descended from a common ancestor or an ancestral gene pool. This universal common ancestor of all organisms is believed to have appeared about 3.5 billion years ago. Biologists regard the ubiquity of the genetic code as definitive evidence in favor of the theory of universal common descent for all bacteria, archaea, and eukaryotes (see: origin of life).

The Journal of Biology and Today’s World is a leading academic research journal, which publishes scholarly articles in the field of medicine and biology. This journal publishes the finest peer-reviewed research in all aspects of medicine and biology keeping in mind the originality, importance, accessibility, timeliness, elegance, and startling conclusions.

Due its broad scope, a diverse set of topics, such as genetics, biotechnology, biochemistry, microbiology, cellular & molecular biology, and disease biology, are covered under the aegis of this journal. Additionally, the journal also provides rapid, authoritative, and insightful reports and interpretation of topical and future trends in science.

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