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- Biology | Definition, History, Concepts, Branches, Facts | Britannica
Biology, study of living things and their vital processes that deals with all the physicochemical aspects of life Modern principles of other fields, such as chemistry, medicine, and physics, for example, are integrated with those of biology in areas such as biochemistry, biomedicine, and biophysics
- Reproduction | Definition, Examples, Types, Importance, Facts . . .
Reproduction, process by which organisms replicate themselves 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 Learn more about the process of reproduction in this article
- Stem cell | Definition, Types, Uses, Research, Facts | Britannica
A stem cell is an undifferentiated cell that can divide to produce some offspring cells that continue as stem cells and some cells that are destined to differentiate (become specialized)
- Red blood cell | Definition, Functions, Facts | Britannica
Red blood cell, cellular component of blood that carries oxygen from the lungs to the tissues and gives vertebrates’ blood its characteristic color The mature human red blood cell is small, round, and biconcave Red blood cells also carry carbon dioxide, a waste product, to the lungs, where it is excreted
- Plant cell | Definition, Diagram, Model, Labeled, Characteristics . . .
A plant cell is the basic unit of all plants Plant cells, like animal cells, are eukaryotic, meaning they have a membrane-bound nucleus and organelles Their characteristic cell wall is composed of cellulose, and they contain chloroplasts for photosynthesis
- Nucleus | Definition, Function, Structure, Facts | Britannica
Nucleus, in biology, a specialized structure occurring in most cells (except bacteria and blue-green algae) and separated from the rest of the cell by a double layer, the nuclear membrane The nucleus controls and regulates the activities of the cell (e g , growth and metabolism) and carries the genes
- Induced pluripotent stem cell (iPS cell) | Definition, Development . . .
Induced pluripotent stem cell, immature cell that is generated from an adult (mature) cell and that has regained the capacity to differentiate into any type of cell in the body Induced pluripotent stem cells were first described in 2006 Learn about their development and applications in this article
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