Disjunctions in Bryophytes
نویسندگان
چکیده
منابع مشابه
Introduction to Bryophytes
Bryophytes mark a pivotal step in land plant evolution, and their significance in the regulation of ecosystems and the conservation of biodiversity is becoming increasingly acknowledged. This introductory textbook assumes no prior knowledge of bryophyte biology, making it ideal for advanced undergraduate and graduate students, as well as for amateur botanists. The authors expertly summarize the...
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Since the availability of first complete DNA sequence of chloroplast genome of Marchantia polymorpha several studies to determine the structure and organization of chloroplast genomes of various plant groups have been made. However the lineage sampling of bryophytes are poorly represented in complete chloroplast genome sequences (only three liverworts, two mosses and one hornwort). This review ...
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Vascular plants, particularly seed plants, dominate vegetation throughout much of the world today, from the lush rainforests of the tropics harbouring a vast diversity of angiosperms, to the boreal forests of coniferous trees, draping the northern latitudes of the globe. This dominance in the landscape is the result of a long evolutionary history of plants conquering land. Evolution is the resu...
متن کاملLearning Disjunctions of Features
Littlestone's Winnow algorithm for learning disjunctions of Boolean attributes where most attributes are irrelevant is one of the most fundamental results in learning theory. Because of the importance of Winnow, it is natural to try extending Winnow to learn disjunctions of features (i.e., concepts). In doing so, we may generalize some earlier applications of Winnow. In this paper, we extend Wi...
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An important question in constraint satisfaction is how to restrict the problem to ensure tractability (since the general problem is NP-hard). The use of disjunctions has proven to be a useful method for constructing tractable constraint classes from existing classes; the well-known`max-closed' and`ORD-Horn' constraints are examples of tractable classes that can be constructed this way. Three s...
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ژورنال
عنوان ژورنال: Annals of the Missouri Botanical Garden
سال: 1972
ISSN: 0026-6493
DOI: 10.2307/2394752