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The evolution of sex can alternatively be described as a kind of gene exchange that is independent from reproduction. [59] According to the Thierry Lodé 's "libertine bubble theory", sex originated from an archaic gene transfer process among prebiotic bubbles.
Evolution of cells refers to the evolutionary origin and subsequent evolutionary development of cells. Cells first emerged at least 3.8 billion years ago [1] [2] [3] approximately 750 million years after Earth was formed.
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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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 ...
In biology, cell theory is a scientific theory first formulated in the mid-nineteenth century, 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 living organisms and also the basic unit ...
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