Palaeobiology of Angiosperm Origins PDF Download
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Author: Norman F. Hughes
Publisher: CUP Archive
ISBN: 9780521208093
Category : Science
Languages : en
Pages : 270
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Book Description
Mr Hughes argues that approaches (previous to 1976) to the evolutionary origin and early history of or flowering plants have been inadequate and misleading. He suggests that the date is in the Cretaceous period and there is a good chance of ancestors being found if other fossil plants of that period are studied.
Author: Norman F. Hughes
Publisher: CUP Archive
ISBN: 9780521208093
Category : Science
Languages : en
Pages : 270
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Book Description
Mr Hughes argues that approaches (previous to 1976) to the evolutionary origin and early history of or flowering plants have been inadequate and misleading. He suggests that the date is in the Cretaceous period and there is a good chance of ancestors being found if other fossil plants of that period are studied.
Author: Norman Francis Hughes
Publisher: Cambridge University Press
ISBN: 9780521411455
Category : Science
Languages : en
Pages : 322
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Book Description
The enigmatic origins of the dominant flowering plant groups are reviewed in this book.
Author: Norman Francis Hughes
Publisher:
ISBN:
Category :
Languages : en
Pages : 242
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Book Description
Author: Valentin A. Krassilov
Publisher: Pensoft Publishers
ISBN: 9789546420169
Category : Science
Languages : en
Pages : 280
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Book Description
Author: Xin Wang
Publisher: Springer Science & Business Media
ISBN: 3642011608
Category : Science
Languages : en
Pages : 247
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Book Description
Angiosperms are the most diversi ed plant group in the world, being represented by ca 300,000 species in about 400 families. Like all of Life, including ourselves, they have had their own history and gone through many evolutionary stages before they arrived at their current forms. The origin of Angiospermae ( owering plants) has been the subject of much dispute because this is a key event in the history of life, and has a far-reaching in uence on our understanding of relationships among seed plants as a whole as well as within the angiosperms. Until recently most of palae- otanists recognized angiosperms only from the Cretaceous and younger strata. This contradicts the results of molecular analyses. I have been working on Mesozoic fossil plants for the past two decades, during which time I have studied a number of fossil plants. Some of these fossil plants have been published as Jurassic angiosperms, and, unsurprisingly, many questions and doubts have been raised about them. These questions need to be addressed se- ously and journal papers do not provide suf cient space to compare and relate these early angiosperms. In this book these pioneer angiosperms are documented in detail, sometimes with new specimens not studied before. Also, I propose a de nition of angiosperms that could be adopted in palaeobotany. My aim is to improve clarity and objectivity of judgment about what constitutes a fossil angiosperm.
Author: Norman Francis Hughes
Publisher:
ISBN:
Category : Angiosperms, Fossil
Languages : en
Pages : 242
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Book Description
Author: Else Marie Friis
Publisher: CUP Archive
ISBN: 9780521311731
Category : Science
Languages : en
Pages : 372
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Book Description
An overview of works on the origins of angiosperms and the ecological effects upon terrestrial life of their rapid radiation.
Author: Charles B. Beck
Publisher:
ISBN: 9780231038577
Category : Science
Languages : en
Pages : 341
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Book Description
Author: Philip C J Donoghue
Publisher: CRC Press
ISBN: 020364252X
Category : Nature
Languages : en
Pages : 305
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Book Description
Determining the precise timing for the evolutionary origin of groups of organisms has become increasingly important as scientists from diverse disciplines attempt to examine rates of anatomical or molecular evolution and correlate intrinsic biological events to extrinsic environmental events. Molecular clock analyses indicate that many major groups
Author: Thomas Stainforth Kemp
Publisher: Oxford University Press, USA
ISBN: 9780199691883
Category : Biology
Languages : en
Pages : 0
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Book Description
In the grand sweep of evolution, the origin of radically new kinds of organisms in the fossil record is the result of a relatively simple process: natural selection marching through the ages. Or is it? Does Darwinian evolution acting over a sufficiently long period of time really offer a complete explanation, or are unusual genetic events and particular environmental and ecological circumstances also involved? With The Origin of Higher Taxa, T.S. Kemp sifts through the layers of paleobiological, genetic, and ecological evidence on a quest to answer this essential, game-changing question of biology. Looking beyond the microevolutionary force of Darwinian natural selection, Kemp enters the realm of macroevolution, or evolution above the species level. From the origin of mammals to the radiation of flowering plants, these large-scale patterns - such as the rise of novel organismal design, adaptive radiations, and lineage extinctions - encompass the most significant trends and transformations in evolution. As macroevolution cannot be studied by direct observation and experiment, scientists have to rely on the outcome of evolution as evidence for the processes at work, in the form of patterns of species appearances and extinctions in a spotty fossil record, and through the nature of species extant today. Marshalling a wealth of new fossil and molecular evidence and increasingly sophisticated techniques for their study, Kemp here offers a timely and original reinterpretation of how higher taxa such as arthropods, mollusks, mammals, birds, and whales evolved - a bold new take on the history of life. -- from back cover.
