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Morphology (biology)

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Morphology (biology)
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{{short description|In biology, the form and structure of organisms}}{{About|the term in biology||Morphology (disambiguation){{!}}Morphology}}{{refimprove|date=November 2014}}File:Caprella mutica male morphology.jpg|thumb|Morphology of a male shrimp, Caprella muticaCaprella muticaMorphology is a branch of biology dealing with the study of the form and structure of organisms and their specific structural features.WEB,weblink Morphology, Oxford Dictionary, Oxford University Press, 2018-02-22, This includes aspects of the outward appearance (shape, structure, colour, pattern, size), i.e. external morphology (or eidonomy), as well as the form and structure of the internal parts like bones and organs, i.e. internal morphology (or anatomy). This is in contrast to physiology, which deals primarily with function. Morphology is a branch of life science dealing with the study of gross structure of an organism or taxon and its component parts.

History

The word "morphology" is from the Ancient Greek μορφή, morphé, meaning "form", and λόγος, lógos, meaning "word, study, research".While the concept of form in biology, opposed to function, dates back to Aristotle (see Aristotle's biology), the field of morphology was developed by Johann Wolfgang von Goethe (1790) and independently by the German anatomist and physiologist Karl Friedrich Burdach (1800).BOOK, Karl, Mägdefrau, 1992, Geschichte der Botanik [History of Botany], 2, Gustav Fischer Verlag, Jena, 3-437-20489-0, Among other important theorists of morphology are Lorenz Oken, Georges Cuvier, Étienne Geoffroy Saint-Hilaire, Richard Owen, Karl Gegenbaur and Ernst Haeckel.Richards, R. J. (2008). A Brief History of Morphology. In: The Tragic Sense of Life. Ernst Haeckel and the Struggle over Evolutionary Thought. Chicago: University of Chicago Press.Di Gregorio, M. A. (2005). From Here to Eternity: Ernst Haeckel and Scientific Faith. Gottingen: Vandenhoeck & Ruprecht.In 1830, Cuvier and E.G.Saint-Hilaire engaged in a famous debate, which is said to exemplify the two major deviations in biological thinking at the time – whether animal structure was due to function or evolution.Appel, Toby (1987). The Cuvier-Geoffroy Debate: French Biology in the Decades Before Darwin. New York: Oxford University Press.

Divisions of morphology

  • Comparative morphology is analysis of the patterns of the locus of structures within the body plan of an organism, and forms the basis of taxonomical categorization.
  • Functional morphology is the study of the relationship between the structure and function of morphological features.
  • Experimental morphology is the study of the effects of external factors upon the morphology of organisms under experimental conditions, such as the effect of genetic mutation.
  • "Anatomy" is a "branch of morphology that deals with the structure of organisms".WEB,weblink Anatomy – Definition of anatomy by Merriam-Webster, merriam-webster.com,
  • Molecular Morphology is a term used in English-speaking countries for describing the structure of compound molecules, such as polymers WEB,weblink 2010-06-24, ceas.uc.edu/, Polymer Morphology, and ribonucleic acid (RNA).
  • Gross Morphology refers to the collective structures of an organism as a whole as a general description of the form and structure of an organism, taking into account all of its structures without specifying an individual structure.

Morphology and classification

Most taxa differ morphologically from other taxa. Typically, closely related taxa differ much less than more distantly related ones, but there are exceptions to this. Cryptic species are species which look very similar, or perhaps even outwardly identical, but are reproductively isolated. Conversely, sometimes unrelated taxa acquire a similar appearance as a result of convergent evolution or even mimicry. In addition, there can be morphological differences within a species, such as in Apoica flavissima where queens are significantly smaller than workers. A further problem with relying on morphological data is that what may appear, morphologically speaking, to be two distinct species, may in fact be shown by DNA analysis to be a single species. The significance of these differences can be examined through the use of allometric engineering in which one or both species are manipulated to phenocopy the other species.A step relevant to the evaluation of morphology between traits/features within species, includes an assessment of the terms: homology and homoplasy. Homology between features indicate that those features have been derived from a common ancestor.BOOK,weblink A dictionary of ecology, evolution, and systematics, J., Lincoln, Roger, 1998, Cambridge University Press, Boxshall, Geoffrey Allan., Clark, P. F., 052143842X, 2nd, Cambridge, 36011744, Alternatively, homoplasy between features describes those that can resemble each other, but derive independently via parallel or convergent evolution.BOOK,weblink Vertebrate life, Harvey., Pough, F., 2009, Benjamin Cummings, Janis, Christine M. (Christine Marie), 1950-, Heiser, John B., 0321545761, 8th, San Francisco, 184829042,

3D cell morphology: classification

Invention and development of microscopy enable the observation of 3-D cell morphology with both high spatial and temporal resolution. The dynamic processes of these cell morphology which are controlled by a complex system play an important role in varied important biological process, such as immune and invasive responses.A. D. Doyle, R. J. Petrie, M. L. Kutys, and K. M. Yamada, “Dimensions in cell migration,” Curr. Opin. Cell Biol., vol. 25, no. 5, pp. 642–649, 2013. A. C. Dufour, T. Y. Liu, D. Christel, T. Robin, C. Beryl, T. Roman, G. Nancy, O.H. Alfred, and J. C. Olivo-Marin. "Signal Processing Challenges in Quantitative 3-D Cell Morphology: More than meets the eye." IEEE Signal Processing Magazine, vol. 32, no. 1, pp. 30-40, 2015.

See also

References

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External links

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