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Evolution of sexual reproduction describes how sexually reproducing animals, plants, fungi and protists could have evolved from a common ancestor that was a single-celled eukaryotic species. [1] [2] [3] Sexual reproduction is widespread in eukaryotes, though a few eukaryotic species have secondarily lost the ability to reproduce sexually, such ...
686465. Anatomical terminology. [ edit on Wikidata] The cell is the basic structural and functional unit of all forms of life. Every cell consists of cytoplasm enclosed within a membrane; many cells contain organelles, each with a specific function. The term comes from the Latin word cellula meaning 'small room'.
1. All living organisms are composed of one or more cells. 2. The cell is the most basic unit of life. Schleiden's theory of free cell formation through crystallization was refuted in the 1850s by Robert Remak, Rudolf Virchow, and Albert Kolliker. [5] In 1855, Rudolf Virchow added the third tenet to cell theory.
Mine should take some lessons for real," someone else pointed out. "I see an album in their future," another commenter joked. "I swear Dachshund all share one brain cell," one woman teased.
Learning cell. A learning cell is a learning strategy for a pair of students to learn together. It is an active learning style. A learning cell is a process of learning where two students alternate asking and answering questions on commonly read materials.
In multicellular organisms, stem cells are undifferentiated or partially differentiated cells that can change into various types of cells and proliferate indefinitely to produce more of the same stem cell. They are the earliest type of cell in a cell lineage. [1] They are found in both embryonic and adult organisms, but they have slightly ...
Adult stem cells are undifferentiated cells, found throughout the body after development, that multiply by cell division to replenish dying cells and regenerate damaged tissues. Also known as somatic stem cells (from Greek σωματικóς, meaning of the body ), they can be found in juvenile, adult animals, and humans, unlike embryonic stem ...
1974 ( The Viking Press) Media type. Print. The Lives of a Cell: Notes of a Biology Watcher (1974) is collection of 29 essays written by Lewis Thomas for The New England Journal of Medicine between 1971 and 1973. Throughout his essays, Thomas touches on subjects as various as biology, anthropology, medicine, music (showing a particular affinity ...
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