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Morphology of a male skeleton shrimp, Caprella mutica Morphology in biology is the study of the form and structure of organisms and their specific structural features. [1]This includes aspects of the outward appearance (shape, structure, color, pattern, size), i.e. external morphology (or eidonomy), as well as the form and structure of internal parts like bones and organs, i.e. internal ...
Onymacris unguicularis beetle with landmarks for morphometric analysis. In landmark-based geometric morphometrics, the spatial information missing from traditional morphometrics is contained in the data, because the data are coordinates of landmarks: discrete anatomical loci that are arguably homologous in all individuals in the analysis (i.e. they can be regarded as the "same" point in each ...
The study of evolutionary morphology concerns changes in species morphology over time in order to become better suited to their environment. [ 3 ] [ 16 ] These studies are conducted by comparing the features of species groups to provide a historical narrative of the changes in morphology observed with changes in habitat.
The initial step involves selecting multiple phenotypic descriptors (characteristics described in appropriate ways) that vary among different taxa. [7] All phenotypic characteristics can be used to evaluate the disparity of a group, but the morphological characteristics are mostly used, because they are more accessible than others. [1]
Anatomical variations are categorized into three types including morphometric (size or shape), consistency (present or absent), and spatial (proximal/distal or right/left). [ 1 ] Variations are seen as normal in the sense that they are found consistently among different individuals, are mostly without symptoms, and are termed anatomical ...
Gross anatomy (also called topographical anatomy, regional anatomy, or anthropotomy) is the study of anatomical structures that can be seen by the naked eye. [1] Microscopic anatomy is the study of minute anatomical structures assisted with microscopes , which includes histology (the study of the organization of tissues), [ 1 ] and cytology ...
Evolutionary developmental biology – Comparison of organism developmental processes; Definition of Phylum based on body plan – High level taxonomic rank for organisms sharing a similar body plan; Ediacaran biota – Life of the Ediacaran period; Macroevolution – Evolution on a scale at or above the level of species
Some of the earliest ideas and mathematical descriptions on how physical processes and constraints affect biological growth, and hence natural patterns such as the spirals of phyllotaxis, were written by D'Arcy Wentworth Thompson in his 1917 book On Growth and Form [2] [3] [note 1] and Alan Turing in his The Chemical Basis of Morphogenesis (1952). [6]