percentages of sexually expressed gametes. Abstract: The Ceratopteris genus is a model plant system in allowing the study of life and reproductive cycles of spores‚ allowing for spore to gamete cellular and physical observation. The triangle water fern‚ Ceratopteris richardii‚ provided for visual identification of this transition. Spores of different densities were inoculated‚ cultured‚ and observed in germination and sexual expression. We estimated higher spore densities increase percentages of
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BOTANY FINAL REVIEW CHAPTER 3 1.Parenchyma- Alive‚ “loosely packed”‚ most versatile‚ can photosynthesize ‚storage ‚1 cell wall Collenchyma- Alive‚ chunky‚ thick at corners‚ 1 cell wall Scherenchyma- Dead‚ support and protection‚ 2 cell walls 2. Cells in vascular tissue: XYLEM PHLOEM What substance(s) is/areTransported in this tissue? | Transports waterAnd nutrients | Transports sugars | In which direction is
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TWo PaPeRS on FaShIon TheoRy 2 When all that is Solid Melts into Fashion - fashion’s FLIRT with modernity Nikolina Olsen-Rule // External Lecturer‚ University of Århus // nor@dkds.dk // Research Assistant // Danmarks Designskole // 2006 0 Ferns in Fashion - on the Logic of Trends Maria Mackinney-Valentin // Ph.D. Scholar // mmk@dkds.dk // Center for Design Research // Danmarks Designskole // 2006 ISBn 87-983504-0-4 side nikolina olsen-Rule // 2006 When aLL ThaT IS SoLID MeLTS
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GE 201: INTRODUCTION TO BIOGEOGRAPHY AND ETHNOBIOLOGY: PLANTS‚ ANIMALS AND THE HUMAN ENVIRONMENT Nasoata Write-Up Mavileko Ramoica S11048002. Rivers‚ as they flow to the sea they carry with them sediments. Sediment transportation is dominant in the upland flows where the velocity or speed of the river flow is very fast and the slope is of a steep type. As the sediments are carried along to the lowland‚ the water velocity is reduced and so there is a reduction in the speed of the
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Biology 12 3rd Exam Reviewer Exercise 9: The Prokaryotes Prokaryotes are subdivided into archaebacteria and eubacteria. Archaebacteria - no peptidoglycan in cell wall Ex. Halob acterium Eubacteria - has peptidoglycan in cell wall Eubacteria - can be differentiated by Gram staining Gram positive: purple-blue‚ mostly peptidoglycan susceptible to penicillin Gram negative: pink-red‚ less peptidoglycan‚ has lipopolysaccharides‚ susceptible to EDTA Gram negative can be further differentiated into
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spore-producing cells undergo meiosis to form haploid spores. In ferns and their allies‚ including clubmosses and horsetails‚ the conspicuous plant observed in the field is the diploid sporophyte. The haploid spores develop in sori on the underside of the fronds and are dispersed by the wind (or in some cases‚ by floating on water). If conditions are right‚ a spore will germinate and grow into a rather inconspicuous plant body called a prothallus. Fern sperms then swim to the egg in the archegonium and produce
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Chapter 1 INTRODUCTION Azolla (mosquito fern‚ duckweed fern‚ fairy moss‚ and water fern) is a genus of seven species of aquatic ferns in the family Salviniaceae. They are extremely reduced in form and specialized‚ looking nothing like conventional ferns but more resembling duckweed or some mosses. Azolla is a free floating aquatic fern‚ which nowadays can be found in freshwater environments in temperate and tropical regions all over the world. It ranks among the fastest growing plants on Earth
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example metabolic engineering of plants. Introduction: Why Study Medicinal Plants Plant resources for new medicine Bryophytes (nonvascular plants‚ e.g. liverwort and moss) have about 15‚350 species. Seedless vascular plants (commonly called fern) are estimated about 12‚ 157 species Gymnosperm has about 760 species. Angiosperm is estimated to have more than 250‚000 species. Introduction: Why Study Medicinal Plants Bryophytes (nonvascular
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fertilized to form the diploid zygote. The zygote develops into a sporophyte that is dependent on the parent gametophyte. Mature sporophytes produce haploid spores by meiosis in sporangia. When a spore germinates‚ it grows into another gametophyte. Ferns and their allies‚ including clubmoss and horsetails‚ reproduce via an alternation of generations. The conspicuous plant observed in the field is the diploid
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The evolution of plants has resulted in increasing levels of complexity‚ from the earliest algal mats‚ through bryophytes‚ lycopods‚ ferns to the complex gymnosperms and angiosperms of today. While the groups which appeared earlier continue to thrive‚ especially in the environments in which they evolved‚ each new grade of organisation has eventually become more "successful" than its predecessors by most measures. Probably an algal scum formed on land 1‚200 million years ago. In the Ordovician period
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