By Brian K. Hall
The software of homology varies looking on the information being tested. This quantity represents a cutting-edge therapy of the various purposes of this unifying thought. Chapters care for homology on all degrees, from molecules to behaviour, and are authored through best participants to systematics, ordinary heritage, and evolutionary, developmental, and comparative biology.
This paperback reprint of the unique hardbound version maintains to commemorate the one hundred and fiftieth anniversary of Sir Richard Owen's seminal paper distinguishing homology from analogy.
- Commemoration of the a hundred and fiftieth anniversary of Sir Richard Owen's seminal paper distinguishing homology from analogy
- Contributors who're well known leaders in comparative biology
- Coverage that's either complete and interdisciplinary
Read or Download Homology. The Hierarchical Basis of Comparative Biology PDF
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Extra resources for Homology. The Hierarchical Basis of Comparative Biology
T h u s , examples of Owen's serial homology, s u c h a s the r e s e m b l a n c e s between successive vertebrae, were homoplastic and while the heart of a bird and that of a mammal were homogenous as vertebrate hearts, the four chambers into which each is divided (assuming independent origin) were homoplastic between the two animals. Finally, two structures analogous but not homologous by any definition Richard Owen and the Concept of Homology 45 were also homoplastic. It is in the last two s e n s e s t h a t homoplastic is used today.
Female morphs of Papilio dardanus planamoides, (b) niobe. " So, de Beer demonstrated t h a t homologous s t r u c t u r e s in two or more related species may differ in their relationship to the segments or other m a r k e r s of position in the body, in their origin within the developing embryo, in their mode of induction in embryology, and in their genetic origin. F u r t h e r m o r e , f e a t u r e s a p p a r e n t l y h o m o l o g o u s between animal groups may not be of universal occurrence within those groups (as is the case with eusociality in hymenopterous insects).
But he is correct in giving MacLeay the credit. Macleay is known principally as the inventor of the Quinarian system of classification (for details, see Panchen, 1992, pp. 23-25) in which animal taxa were arranged in groups of five, represented in a circle, with individual taxa subdivided into five and so on. But MacLeay s system started with his attempts to arrange the 10 then recognized major groups of insects. He ordered them into two groups of five, the Mandibulata and Haustellata, using the n a t u r e of their mouth parts (after Cuvier and Lamarck).