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homology    
n. 相同,异体同形,同族关系

相同,异体同形,同族关系

homology
透射

homology
n 1: the quality of being similar or corresponding in position
or value or structure or function

Homology \Ho*mol"o*gy\, n. [Gr. ? agreement. See {Homologous}.]
1. The quality of being homologous; correspondence; relation;
as, the homologyof similar polygons.
[1913 Webster]

2. (Biol.) Correspondence or relation in type of structure in
contradistinction to similarity of function; as, the
relation in structure between the leg and arm of a man; or
that between the arm of a man, the fore leg of a horse,
the wing of a bird, and the fin of a fish, all these
organs being modifications of one type of structure.
[1913 Webster]

Note: Homology indicates genetic relationship, and according
to Haeckel special homology should be defined in terms
of identity of embryonic origin. See {Homotypy}, and
{Homogeny}.
[1913 Webster]

3. (Chem.) The correspondence or resemblance of substances
belonging to the same type or series; a similarity of
composition varying by a small, regular difference, and
usually attended by a regular variation in physical
properties; as, there is an homology between methane,
{CH4}, ethane, {C2H6}, propane, {C3H8}, etc., all members
of the paraffin series. In an extended sense, the term is
applied to the relation between chemical elements of the
same group; as, chlorine, bromine, and iodine are said to
be in homology with each other. Cf. {Heterology}.
[1913 Webster]

{General homology} (Biol.), the higher relation which a
series of parts, or a single part, bears to the
fundamental or general type on which the group is
constituted. --Owen.

{Serial homology} (Biol.), representative or repetitive
relation in the segments of the same organism, -- as in
the lobster, where the parts follow each other in a
straight line or series. --Owen. See {Homotypy}.

{Special homology} (Biol.), the correspondence of a part or
organ with those of a different animal, as determined by
relative position and connection. --Owen.
[1913 Webster]


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  • Homology - Definition and Examples - Biology Online Dictionary
    In biology, homology refers to the similarity of the structure, physiology, or development of various species of other organisms as a result of their shared evolutionary parent It plays a huge part in evolutionary biology
  • Homologies - Understanding Evolution
    If different species share common ancestors, we would expect organisms to share similarities inherited from those ancestors Features inherited from common ancestors—even if their appearance is quite different in close relatives— are known as homologies Homologies can be identified by comparing the anatomies of different living things, looking at cellular similarities, studying
  • What is homology in biology? - California Learning Resource Network
    Homology is a fundamental concept in biology that has far-reaching implications for our understanding of the natural world In this article, we will delve into the meaning and significance of homology, exploring its definition, types, and examples in various biological contexts
  • Homology (biology) - New World Encyclopedia
    In biology, homology is commonly defined as any similarity between structures of organisms in different taxa that derives from similar structures in their shared ancestry Examples of homology occur at different levels of organization
  • Understanding Homology in Biology – Onestepguide
    This article delves into the intricate world of homology in biology, exploring its various types, significance in evolutionary theory, applications in research, and the challenges and future directions in homology studies
  • homology - Wiktionary, the free dictionary
    If the homology centre lies on the homology axis, the homology is said to be singular or parabolic; otherwise, it is called non-singular or hyperbolic ( topology , algebraic topology ) A general way of associating a sequence of algebraic objects, such as abelian groups or modules , to a sequence of topological spaces ; also used attributively
  • Homology (mathematics) - Wikipedia
    In mathematics, the term homology, originally introduced in algebraic topology, has three primary, closely-related usages The most direct usage of the term is to take the homology of a chain complex, resulting in a sequence of abelian groups called homology groups





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