Author: Publisher:
ISBN:
Category : Marine animals
Languages : en
Pages : 340
Book Description
Microfauna marina
Author: Microfauna Marina
Author: Peter AxPublisher:
ISBN: 9783437308284
Category :
Languages : de
Pages : 332
Book Description
Microfauna Marina
Author: Microfauna marina. 11 (1997)
Author: [Anonymus AC02257865]Publisher:
ISBN: 9783437256967
Category :
Languages : de
Pages : 320
Book Description
Microfauna Marina
Author: Peter AxMulticellular Animals
Author: Peter AxPublisher: Springer Science & Business Media
ISBN: 3642801145
Category : Science
Languages : en
Pages : 226
Book Description
No one can ever have secure knowledge about the gods and creatures, and should anyone hit by chance upon the right thing, he will not know it for sure; that is why everything that we believe to be true is "opinion". XENOPHANES around 500 B.C. (According to ROD 1988, p.85) The goal of phylogenetic systematics (cladistics) is to discover the kinship relations between all organisms on earth and to translate the order we perceive in Nature into an equivalent man-made system. Although the goal is easily formulated, the path is thorny, and the results achieved continue to be imperfect. This is the fate of any science that bases its propositions on the interpretation of histor ical evidence. The diversity found in the millions of species originated as a result of the continuous splitting of biopopulations through time. Combined with this was the emergence of hierarchically linked des cent communities of species. We call the process of origin of descent communities phylogenesis. We do not know, however, the exact course of phylogenesis - we can only formulate hypotheses. The historical evidence at hand consists of the feature patterns of extant species and of extinct species with their combination of original and derived traits which are the result of evolution.
The Evolution of Organ Systems
Author: Andreas Schmidt-RhaesaPublisher: Oxford University Press
ISBN: 0198566689
Category : Language Arts & Disciplines
Languages : en
Pages : 396
Book Description
Although there are several books on the phylogenetic relationships of animals, this is the first to focus on the consequences of such relationships for the evolution of organs themselves. It provides a summary of evolutionary hypotheses for each of the major organ systems, describing alternative theories in those cases of continuing controversy.
Subterranean Copepoda from Arid Western Australia
Author: Tomislav KaranovichPublisher: BRILL
ISBN: 904741277X
Category : Science
Languages : en
Pages : 372
Book Description
Though the subterranean waters are among the most fragile and threatened ecosystems, and are also considered to be rich in biodiversity, there is very little information even on their total biological diversity. Presenting one group of small crustaceans, this book shows how rich and complex subterranean systems may be even in Australian desert regions. This is the first comprehensive study of the subterranean copepods from Australia. It contains descriptions of five new genera and 24 new species. Many representatives of this unique fauna are of ancient origin, dating as far back as Jurassic. Because many questions of the copepod invasions of the freshwater, and their connections with the main climatic changes are addressed, this book will also be useful for a much broader scientific audience.
Asian Marine Biology 1984
Author: Brian MortonPublisher: Hong Kong University Press
ISBN: 9789622091139
Category : Science
Languages : en
Pages : 196
Book Description
This is the annual journal of the Marine Biological Association of Hong Kong. It contains papers on marine subjects of interest to all Asian biologists.
Origin and Evolution of Metazoan Cell Types
Author: Sally LeysPublisher: CRC Press
ISBN: 1315388200
Category : Nature
Languages : en
Pages : 136
Book Description
The evolution of animal diversity is strongly affected by the origin of novel cell and tissue types and their interactions with each other. Understanding the evolution of cell types will shed light on the evolution of novel structures, and in turn highlight how animals diversified. Several cell types may also have been lost as animals simplified – for example did sponges have nerves and lose them? This book reveals the interplay between gains and losses and provides readers with a better grasp of the evolutionary history of cell types. In addition, the book illustrates how new cell types allow a better understanding permitting the discrimination between convergence and homology.