Origin Of A Land Flora

Author: F. O. (Frederick Orpen) 1855-194 Bower
Publisher: Wentworth Press
ISBN: 9781371782221
Size: 75.85 MB
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This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.

The Origin Of A Land Flora

Author: Bower F O (Frederick Orpen 1855-1948
Publisher: Hardpress Publishing
ISBN: 9781314293791
Size: 62.87 MB
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Although occasionally there may be certain imperfections with these old texts, we feel they deserve to be made available for future generations to enjoy.

Paleobotany And The Evolution Of Plants

Author: Wilson Nichols Stewart
Publisher: Cambridge University Press
ISBN: 9780521382946
Size: 10.47 MB
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7.5A) with complex and partially independent sporophytes (for example
Anthoceros) are primitive and “caught-in-the-act” of becoming reduced and
dependent on the photosynthetic gametophyte. For the evolutionary origin of
vascular land plants from the hypothetical algal ancestor, Zimmermann shows us
(Fig. 7.5B) that the oogamous gametophyte phase is reduced when compared
with the photosynthetic sporophyte. The latter evolved tetrahedral quartets of
thick-walled meisopores ...

Bryophyte Biology

Author: A. Jonathan Shaw
Publisher: Cambridge University Press
ISBN: 9780521667944
Size: 78.93 MB
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Origin. and. phylogenetic. relationships. of. bryophytes. 4.1 Introduction The
origin of a land flora during the Upper Ordovician-Lower Silurian border (± 440
millions years ago) represents a significant evolutionary event in the history of life
. The subsequent evolution of a diverse autotrophic land flora created the
conditions necessary for the diversification of a terrestrial heterotrophic fauna (
Behrensmeyer et al. 1992). Today the land flora comprises roughly 300000
species distributed ...

Invasions Of The Land

Author: Malcolm S. Gordon
Publisher: Columbia University Press
ISBN: 9780231514026
Size: 50.53 MB
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This scenario is, in fact, the antithetic or interpolation theory for the origin of the
land plant life cycle. Although this theory currently is in vogue, it is important to
remember that compelling evidence against the homologous or transformation
theory has yet to be produced. Schuster (1983) argued for a common ancestor to
bryophytes and vascular plants that possessed an isomorphic alternation of
generations. But the failure to find this life cycle in any of the extant
Charophyceae has ...

Evolution Of Fungi And Fungal Like Organisms

Author: Stefanie Pöggeler
Publisher: Springer Science & Business Media
ISBN: 9783642199745
Size: 31.99 MB
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These fossil hyphae and spores resemble modern AMF (Redecker 2000a) and it
was concluded that terrestrial AMF already existed at a time when the land flora
most likely consisted only of bryophyte-like 'lower' plants, 460 MY ago. Altogether
... B. Molecular Clock Estimates During the past 15 years molecular clock
estimates of the origin of the Glomeromycota have varied by a factor of three and
there are no widely accepted values for the age of the main fungal lineages. The
known ...

The Chain Of Life In Geological Time A Sketch Of The Origin And Succession Of Animals And Plants

Author: Sir John William Dawson
Publisher: Library of Alexandria
ISBN: 1465541942
Size: 30.15 MB
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It is probable that these discoveries represent merely a small proportion of the
plants actually existing in the Silurian period. All the deposits of this age at
present known to us are marine; and most of them were probably formed at a
distance from land, so that it is little likely that land plants could find their way into
them. At any time the discovery of an estuarine or lacustrine deposit of Silurian
age might wonderfully extend our knowledge of this ancient flora. The Devonian
or Erian age, ...

The Annotated Origin

Author: Charles Darwin
Publisher: Harvard University Press
ISBN: 9780674032811
Size: 20.11 MB
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Heron, Sir R., on peacocks, 89 Heusinger, on white animals not poisoned by
certain plants, 12 Hewitt, Mr., on sterility of first crosses, 264 Higher categories,
arbitrariness of, 419; change in function, 190-191; origin, 123, 128, 171, 183, 186
, 192, ... Captain, on crossed geese, 253 Huxley, Prof., on structure of
hermaphrodites, Jordan's law, 355 Jussieu on classification, 4 1 7 Kentucky,
caves of, 137 Kerguelen-land, flora of, 381, 399 Kidney-bean, acclimatisation of,
142 Kidneys of birds, ...