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By stotting (also called pronking), a springbok (Antidorcas marsupialis) signals honestly to predators that it is young, fit, and not worth chasing.. Within evolutionary biology, signalling theory is a body of theoretical work examining communication between individuals, both within species and across species.
The definition is context-dependent, and can refer to the biological target of a pharmacologically active drug compound, the receptor target of a hormone (like insulin), or some other target of an external stimulus.
She is the George Barth Geller Professor of Research in Molecular Biology and Chair of the Department of Cell Biology at Duke University, as well as the director of the Duke Stem Cell Program. [163] Fred Hollows (1929–1993): New Zealand and Australian ophthalmologist. He became known for his work in restoring eyesight for countless thousands ...
[6] [7] [8] In addition to animal locomotion , most animals are motile, though some are vagile, described as having passive locomotion . Many bacteria and other microorganisms , including even some viruses , [ 9 ] and multicellular organisms are motile; some mechanisms of fluid flow in multicellular organs and tissue are also considered ...
Melo amphora moving across coral at low tide. In some (but not all) sea snails, marine gastropod molluscs, the animal has an anterior extension of the mantle called a siphon, or inhalant siphon, through which water is drawn into the mantle cavity and over the gill for respiration.
Cell Biology in "The Biology Project" of University of Arizona. Centre of the Cell online; The Image & Video Library of The American Society for Cell Biology Archived 2011-06-10 at the Wayback Machine, a collection of peer-reviewed still images, video clips and digital books that illustrate the structure, function and biology of the cell.
Evolution is the change in the heritable characteristics of biological populations over successive generations. [1] [2] It occurs when evolutionary processes such as natural selection and genetic drift act on genetic variation, resulting in certain characteristics becoming more or less common within a population over successive generations. [3]
The need for a clearly defined and consistent invasion biology terminology has been acknowledged by many sources. Invasive species , or invasive exotics , is a nomenclature term and categorization phrase used for flora and fauna, and for specific restoration-preservation processes in native habitats .