Placodermi
Author: Robert Howland Denison
Publisher:
Published: 1978
Total Pages: 166
ISBN-13:
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Author: Robert Howland Denison
Publisher:
Published: 1978
Total Pages: 166
ISBN-13:
DOWNLOAD EBOOKAuthor: Erik Andersson Stensiö
Publisher:
Published: 1934
Total Pages: 388
ISBN-13:
DOWNLOAD EBOOKAuthor: Peter J. Livesey
Publisher: Psychology Press
Published: 1986
Total Pages: 290
ISBN-13: 9780898595529
DOWNLOAD EBOOKFirst published in 1986. Routledge is an imprint of Taylor & Francis, an informa company.
Author: Erik Andersson Stensiö
Publisher:
Published: 1922
Total Pages: 1192
ISBN-13:
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Publisher:
Published: 1993
Total Pages: 60
ISBN-13:
DOWNLOAD EBOOKAuthor: G. N. Rassam
Publisher: Elsevier
Published: 2013-10-22
Total Pages: 569
ISBN-13: 1483286894
DOWNLOAD EBOOKThis thesaurus is presented in six languages, English, French, German, Italian, Russian and Spanish, and sponsored by the International Council for Scientific and Technical Information (ICSTI) and the International Union of Geological Sciences (IUGS). There is a main list of approximately 5000 key terms together with indexes and translations which include a specific linguistic index and a field index in which key terms have been classified by field.
Author: George R. McGhee, Jr.
Publisher: MIT Press
Published: 2019-10-29
Total Pages: 333
ISBN-13: 0262354187
DOWNLOAD EBOOKAn analysis of patterns of convergent evolution on Earth that suggests where we might look for similar convergent forms on other planets. Why does a sea lily look like a palm tree? And why is a sea lily called a “lily” when it is a marine animal and not a plant? Many marine animals bear a noticeable similarity in form to land-dwelling plants. And yet these marine animal forms evolved in the oceans first; land plants independently and convergently evolved similar forms much later in geologic time. In this book, George McGhee analyzes patterns of convergent evolution on Earth and argues that these patterns offer lessons for the search for life elsewhere in the universe. Our Earth is a water world; 71 percent of the earth's surface is covered by water. The fossil record shows that multicellular life on dry land is a new phenomenon; for the vast majority of the earth's history—3,500 million years of its 4,560 million years of existence—complex life existed only in the oceans. Explaining that convergent biological evolution occurs because of limited evolutionary pathways, McGhee examines examples of convergent evolution in forms of feeding, immobility and mobility, defense, and organ systems. McGhee suggests that the patterns of convergent evolution that we see in our own water world indicate the potential for similar convergent forms in other water worlds. We should search for extraterrestrial life on water worlds, and for technological life on water worlds with continental landmasses.
Author: Mauro Luís Triques
Publisher: BRILL
Published: 2024-04-02
Total Pages: 244
ISBN-13: 9004684913
DOWNLOAD EBOOKA new view for studying and understanding biological evolution emerges when the concepts of phylogenetic systematics and exaptation are combined. A new definition of macroevolution is created. Preadaptation is shown to be a null concept and its comparison with exaptation is shown to be inappropriate. This book criticizes the prevailing view, the adaptationist, microevolutionary outlook, which considers adaptation as being the exclusive or main evolutionary process responsible for vertebrates having occupied the terrestrial environment. The authors argue that the macroevolutionary processes are significantly more important to explain an improbable evolutionary event. Their research shows that macroevolutionary processes are the dominant factors involved in the origin of terrestriality. This book is a revised and expanded English translation from the original Portuguese edition Peixes conquistam a terra firme: nova abordagem para um evento acidental único (Editora Baraúna, 2017).
Author: Giacomo Zaccone
Publisher: CRC Press
Published: 2015-08-05
Total Pages: 300
ISBN-13: 1498707564
DOWNLOAD EBOOKThis book on ancient fishes unites the work of many specialists coming from different areas of biology. Hagfishes, lungfishes, Chondrosteans, and Holosteans constitute the main subject of study. Fossil records and extant species are compared to establish the conservation or the degeneration of specific characters. However, phylogenetic relationship
Author:
Publisher:
Published: 1927
Total Pages: 414
ISBN-13:
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