Similarity bewtween characteristics and traits because if a shared ancestory. Link : http://en.wikipedia.org/wiki/Homologous_structure Body parts that are similar in structure and function in different animals
Homology is frequently found in organic chemistry.
The three criteria used to determine whether something is homology are similarity in structure, similarity in function, and evidence of shared ancestry. If two features meet these criteria, they are considered homologous.
The three types of homologies observed in organisms are anatomical, developmental, and molecular homologies. Anatomical homology refers to similarities in body structures, such as limb bones in vertebrates. Developmental homology involves similarities in embryonic development, indicating common ancestry. Molecular homology focuses on genetic similarities, such as shared DNA sequences, which reflect evolutionary relationships among species.
Homology refers to similarity between characteristics in different species of organisms. Bats and butterflies are quite different from each other, yet both have wings to fly; bats fly and whales swim, yet the bones in a bat's wing and whale's flipper are strikingly similar. While 'analogy' refers to different structures which perform the same function, 'homology' refers to similar structures which perform different functions. Prior to the advent of Darwinism, homology was attributed to the existence of archetypes: biological structures are similar because they conform more or less to pre-existing patterns. Charles Darwin, however, offered a different explanation for homology. Darwin proposed that bats and whales possess similar bone structures, not because they were constructed according to the same archetype (which would imply design and thus intelligent causation), but because they were inherited from a common ancestor.
A homology is a likeness in structure between separate organisms due to evolutionary events from the same part or part of a remote ancestor. Whereas analogy is a resemblance and/or comparison of some particulars between things otherwise unlike.
proposed hypothesis of homology based on similarity.
Homology is frequently found in organic chemistry.
Homology
homology
Physical homology, Genetic homology, and Ecological niche
Evolution
Homology- Evolved from a common ancestor Analogous- 2 similar structures that evolved differently
James W. Vick has written: 'Homology theory' -- subject(s): Homology theory
Renzo A. Piccinini has written: 'CW-complexes, homology theory' -- subject(s): Complexes, Homology theory
The key distinction between homology and homoplasy is that homology is when similar traits are inherited from a common ancestor, while homoplasy is when similar traits evolve independently in different species.
Hans Delfs has written: 'Homology of locally semialgebraic spaces' -- subject(s): Algebraic spaces, Homology theory
The three types of homologies are anatomical homology (similar structure), developmental homology (similar embryonic origin), and molecular homology (similar genetic sequence). These homologies provide evidence of common ancestry and evolutionary relationships among different species.