similarity to Lycopods is their environment‚ carboniferous forests. Division Pterophyta is ferns. Ferns have large‚ multiple-veined leaves. Leaves of ferns are called fronds and generally arise from a rhizome. Ferns can range many heights depending on their environment. Tropical ferns can grow very high while ferns in temperate areas can be rather small. Sporangium is generally found on the underside of fern leaves. Cells in the sporangia undergo meiosis and form haploid spores that are released into
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The truth is: trees are not green. The true question you are asking is why LEAVES are green. However‚ I doubt you have any interest in leaves‚ so let me tell you more about trees. A tree is a tall plant with a trunk and branches made of wood. It can live for many years. The four main parts of a tree are the roots‚ the trunk‚ the branches‚ and the leaves. The roots of a tree are usually under the ground. One case for which this is not true are the roots of the mangrove tree.[1] A single tree
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free water. • Some vascular plants survive in harsh conditions (including hot and cool deserts). Ferns belong to the Phylum Pterophyta which also includes horsetails and Psilotum (“whisk fern”). • The ferns are large in numbers and diverse; there are “tree ferns”‚ smaller terrestrial ferns (such as Pteriddiium)‚ and a few aquatic ferns (Marsilea). The latter may be among the more specialized ferns In contrast to mosses (Phylum Bryophyta)‚ the vascular plant sporophyte is dominant over AND is functionally
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and Pterophytes are both plant divisions with a common ancestor‚ they have little in common. While Bryophytes (mosses) are generally nonvascular and very short in height‚ Pterophytes (ferns) are vascular plants that usually grow much taller than mosses. While the dominant generation in mosses is the gametophyte‚ ferns exhibit the sporophyte generation. The details of their alternations of generation vary as well‚ although both have diploid and haploid stages. Alteration of generations is defined as
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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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