Chapter 34 Vertebrates PowerPoint® Lecture Presentations for Biology Eighth Edition Neil Campbell and Jane Reece Lectures by Chris Romero‚ updated by Erin Barley with contributions from Joan Sharp Copyright © 2008 Pearson Education‚ Inc.‚ publishing as Pearson Benjamin Cummings Key Ideas 1. List the derived traits for: chordates‚ craniates‚ vertebrates‚ gnathostomes‚ tetrapods‚ amniotes‚ birds‚ mammals‚ primates‚ humans 2. Explain what Haikouella and Myllokunmingia tell us about
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Evolution by natural selection is slow but can be observed in certain situations. How to spot evolution in real time: Artificial selection – manipulation by humans such as breeding dogs or growing corn. Repro-rate – rate of reproduction. Stochastic Event: unexpected disaster like a volcano eruption or tornado. (Research geological time) LIVING THINGS: Biology – Study of living things. Living things – all the organisms descended from a single-celled ancestor. * Characteristics:
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TABLE OF CONTENTS PAGES INTRODUCTION……………………………………………………………………………. 2 LIFE CYCLE OF Loa loa ……………………………………………………………...4 PATHOLOGY of Loa loa …………………………………………………………………… 6 IMMUNE
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To what extent do you think that The Fly can be read as a metaphor for the cultural fears and anxieties surrounding HIV/AIDS in American in the 1980s American society in the 1980s was traumatized with fear and anxiety over a new disease called AIDS‚ initially emerging among non conventional social groups – mainly gay men‚ though eventually spreading to the ‘ordinary’ population. While the government remained silent‚ the media frantically reported of previously vigorous and healthy people reduced
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CHAPTER 1 INTRODUCTION 1.1. Background Language is an illogical naming system of vocal symbol by means of which members of social group to cooperate or communicate (Bloomfield‚ 1933). Language has many variations since humans as the users of it are very creative. The more creative they are‚ the more variety the language has‚ but before the language experiences variations‚ it first undergoes changes‚ which make it look variable. Such changes occur mainly because humans are interacting with each other
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Intro to Microbiology: Gram stain: Gram + Gram - Exotoxin Except Listeria has endotoxin Endotoxin Except Capsules Strep pneumo VERY Dangerous: (Some Strange Killers Have Pretty Nice Capsules) 1. Salmonella 2. Strep 3. Kleibsiella 4. Hemophilus B 5. Pseudomonas 6. Nisseria-(largest capsule- most likely cause of any toxicity) 7. Citroacter Gram (+) Gram (-) N-acetyl muramic acid (Nam) + N-acetyl glucosamine (Nag) = Peptidoglycan wall Contains
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Textiles are made up from natural or man-made fibres or a combination of both. “Fibres are thin‚ hair-like structures” (Blair‚ n.d: online) that are categorized into two types: long filament fibres and short staple fibres. Natural fibres are usually staple‚ whilst man-made fibres are filament‚ with the exception of silk that comes from a natural source. These raw fibres are spun to produce a long‚ continuous thread referred to as yarn‚ which is then used in a series of methods that include‚ stitching
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50 days from birth. The life cycle from birth to adulthood is only 10-14 days. There are four distinct stages in the life cycle of Drosophila melanogaster. The first is being an egg‚ and this stage lasts for one day. The second stage is being larva and this lasts for six days. There are three sub-levels of this stage being the first-third instar. The third stage is when the D. melanogaster turns into a pupa‚ which lasts about 3-4 days. The last stage is the adult
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maggot therapy mechanisms of action Medicinal maggots have at least two confirmed beneficial effects on wounds that can be supported by laboratory investigations. They are debridement‚ or elimination of necrotic tissue‚ and removal of pathogenic bacteria. There is moreover‚ evidence from recent studies that they may also accelerate wound healing by promoting the formation of granulation tissue as suggested by the early literature‚ Wound debridement activity Necrophagous larvae feed on the dead
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Fig. ( 1 ): Symptoms of an infected onion plants with IYSV in a commercial onion field and greenhouse . Fig. ( 1 -A‚B‚C‚D ) : IYSV Symptoms development in the field showing chlorotic‚ elongate ringed lesions on leaves and tip dieback (A) ‚ Straw-colored‚ lenticular or spindle -shaped lesions (B )‚ chlorotic‚ spindle-shaped lesions on onion leaf and spindle to diamond shaped lesions on the flower scapes (C‚D) . symptoms of IYSV in the greenhouse transmitted with virulifierous Thrips tabaci showing
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