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Tropical plants --- Plants --- Evolution --- Variation --- Tropical plants. --- Evolution. --- Variation. --- Plants - Evolution --- Plants - Variation
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evolution --- floral biology --- genetics --- heterostyly --- plants --- Heterostylism --- Plants --- Evolution --- Plants - Evolution
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Plants --- Paleobotany --- Evolution --- Plant evolution --- Evolution (Biology) --- Fossil botany --- Palaeobotany --- Botany --- Paleontology --- Phylogeny --- Plants - Evolution
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One of the world's leading evolutionary biologists here reexamines the evolutionary history of flowering plants. This important book is the first to interpret the phylogeny of flowering plants in the light of modern knowledge about genetics, developmental biology, and ecology. Mr. Stebbins is concerned with the evolution of genera, families, and other higher taxa; his analysis is based upon a unified theory that identifies the same fundamental processes at work in the origin of both species and the broader taxonomic categories. He shows, however, that subspecific evolution depends primarily on the natural selection of vegetative characters, whereas the emphasis at the transspecific level is on reproductive characters. Major changes in evolutionary direction are interpreted as resulting from an interaction of environmental change and the inherent capacity of the organism to alter preferentially in some ways and not in others. The author facilitates this discussion by examining reversibility in certain simple evolutionary trends. After reviewing basic principles and exploring major patterns of evolution in flowering plants, Mr. Stebbins turns to their actual history. On the basis of a detailed analysis he concludes that the most primitive forms are not represented in any extant category and are not found in the fossil record. His work gives definitive weight to the researches of others who have postulated a monophyletic origin of the angiosperms from a single, extinct group. Although this beautifully illustrated volume will prove indispensable to botanists, it will be of great interest also to any student of evolutionary theory, theoretical biology, and ecology.
Bedecktsamer. --- Bloemen. --- Fleurs. --- Pflanzen (Botanik) --- Phylogenie. --- Flowers. --- Plants -- Evolution. --- SCIENCE / Life Sciences / Botany.
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On connaît Darwin comme fondateur de la théorie de l'évolution. Ce que l'on sait moins, c'est que la grande passion de sa vie a été l'étude des orchidées dont il possédait une extraordinaire collection. Il s'est particulièrement intéressé à leur fécondation par des insectes. Sans les guêpes, y aurait-il encore des orchidées ? Ces dernières ont développé des "stratagèmes" pour attirer les guêpes mâles et les séduire. Les guêpes ne se contentent pas de transporter du pollen, elles font littéralement "jouir" les orchidées. Ces travaux viennent compléter la théorie de l'évolution par une théorie de "l'involution". Les branches de l'arbre de l'évolution viennent se croiser, se mêler. L'orchidée ne peut pas perdurer sans ses liens avec une autre espèce. Loin d'être un cas singulier, ce pourrait être la règle : les arbres et les champignons, les humains et les milliards de bactéries qui les peuplent... Cette nouvelle biologie, initiée par Lynn Margulis, s'oppose au "néodarwinisme", ou théorie du "gène égoïste", pour qui la "concurrence", et non la collaboration ou le lien, est le mécanisme de base. On sait comment cette théorie a essaimé, en particulier dans les sciences économiques, mais aussi en sociologie. La biologie de l'involution multiplie les découvertes. Les auteures poursuivent en présentant les travaux les plus récents sur le langage chimique des plantes, par exemple sur les plants de tabac... Une nouvelle biologie indispensable à l'heure du nouveau régime climatique qui exige que nous connaissions ce à quoi et par quoi nous sommes attachés.
Plantes --- Observation. --- Écophysiologie. --- Observations. --- Plants, Protection of --- Plants (Philosophy) --- Plants --- Origin. --- Metabolism --- Evolution. --- Plants. --- Plant ecophysiology. --- Orchids. --- Biologie --- Botanique --- Naturalisme --- Darwin, Charles --- Plants - Origin. --- Plants - Metabolism --- Plants - Evolution.
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This book is the fifth volume of the “Marine Algal Flora of China-Rhodophyta.” The series has seven volumes covering about 20 orders, 45 families, 173 genera, and 560 species including over 150 species firstly described from China, indicating significant importance to the knowledge of North-Western Pacific marine algal flora. The fifth volume Ahnfeltiales, Gigartinales, Sebdeniales, Nemastomatales, Plocamiales, Gracilariales, and Rhodymeniales. It provides first-hand literatures necessary to phycologists who aimed to study algal taxonomy and diversity, especially in the North Western Pacific region. Almost all species involved are illustrated in detail on morphology, inner structure, habitats, and geographical distribution, based upon herbarium specimens collected along the China coast, and a lot of elaborate pictures are attached inside. This flora will gain our understanding of current Chinese marine red algae, but much research is still necessary to reflect the whole picture of the red algal diversity along the China coast.
Plants—Evolution. --- Water. --- Hydrology. --- Biodiversity. --- Plant ecology. --- Freshwater ecology. --- Marine ecology. --- Plant Evolution. --- Plant Ecology. --- Freshwater and Marine Ecology. --- Red algae
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Pollen --- Congresses --- Spores (Botany) --- Pollen [Fossil ] --- Spores (Botany) [Fossil ] --- Palynology --- Plants --- Evolution --- Pollen - Congresses. --- Spores (Botany) - Congresses. --- Pollen, Fossil - Congresses. --- Spores (Botany), Fossil - Congresses. --- Palynology - Congresses. --- Plants - Evolution - Congresses.
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Monocotyledons --- Botany --- Plants --- Monocotylédones --- Botanique --- Plantes --- Classification --- Morphology --- Evolution --- Morphologie --- Plant morphology. --- Plant and Crop Sciences. Botany --- Classification. --- Evolution. --- Morphology. --- Plant Morphology --- SYS General Systematics --- general systematics --- Plant Morphology. --- Monocotylédones --- Plants - Classification --- Plants - Evolution
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Although they are among the most abundant of all living things and provide essential oxygen, food, and shelter to the animal kingdom, few books pay any attention to how and why plants evolved the wondrous diversity we see today. In this richly illustrated and clearly written book, Karl J. Niklas provides the first comprehensive synthesis of modern evolutionary biology as it relates to plants. After presenting key evolutionary principles, Niklas recounts the saga of plant life from its origins to the radiation of the flowering plants. To investigate how living plants might have evolved, Niklas conducts a series of computer-generated "walks" on fitness "landscapes," arriving at hypothetical forms of plant life strikingly similar to those of today and the distant past. He concludes with an extended consideration of molecular biology and paleontology. An excellent overview for undergraduates, this book will also challenge graduate students and researchers.
Plants --- Evolution. --- 575.8 --- Evolution. Origin of species. Phylogeny --- SYS General Systematics --- evolution --- general systematics --- palaeobotany --- speciation --- 575.8 Evolution. Origin of species. Phylogeny --- Plant evolution --- Evolution (Biology) --- Evolution --- Phylogeny --- Plants - Evolution. --- PLANTS --- EVOLUTION --- TEXTBOOKS
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