I. INTRODUCTION Independent Study Questions 1.) What is the fundamental difference between eukaryotic and prokaryotic cells? Procaryotic cells do not contain a membrane-bound nucleus or any membrane-bound organelles. Eurkaryotic cells contain both a membrane mound nucleus and membrane-bound organelles (making them far more complex). 2.) List and describe the two domains of prokaryotic organisms. a. Bacteria- Most are a specific shape (cylindrical‚ spiral‚ or spherical). Cell
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BIO 330 Exam 1 Lecture 1 * The oldest shell middens from South Africa have been dated in 140‚000 years old * Modern science is based on the application of the scientific method Lecture 2 * In the middle‚ ascending mantle material makes a mid ocean ridge * In areas where two continents are pushing against each other‚ one sinks underneath the other producing subduction zones that create deep trenches * Solid water (ice) displaces more volume than liquid water‚ therefore it floats
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Hand pollination (also called "mechanical pollination") is a technique used when natural‚ or open pollination is insufficient or undesirable. The most common techniques are for crops such as cucurbits‚ which may exhibit poor pollination by fruitabortion‚ fruit deformity or poor maturation. Hand-pollination is an option only on a small scale‚ but is a common technique by home and small market gardeners‚ involving the transfer of pollen with an artist’s brush or cotton swab from male to female flowers
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Aseptic Technique and Culturing Microbes‚ Lab #3 Purpose: The purpose of the this experiment is to learn to transfer microorganisms to a nutrient medium to promote growth using aseptic techniques. which are a method used to prevent unwanted organisms from contaminating a medium. We will also learn about different types of culture media‚ including MRS broth and nutrient broth‚ learn about oxygen and temperature requirements for microbial growth and how to control microbial growth. Procedure:
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· Taxonomy ○ Science of classification ○ Provides an orderly basis for the naming of organisms and for placing organisms into a category (taxon) ○ Makes use of and makes sense of the fundamental concepts of unity and diversity among living things ○ Basic principle is that members of higher-levels groups share fewer characteristics than those in lower-level groups * Escherichia coli - rod shape and have a Gram-negative cell wall * Even members of the same species display variations
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Evolution of Facultative Paedomorphosis in Newts and Salamanders (Caudata) INTRODUCTION Evolution is the ultimate result of a number of influences which either promote or limit change. Ontogenesis‚ or the development of a new organism can arise from small changes in genes that induce phenotypic variation. A vertebrate usually experiences three different events during its life‚ birth‚ metamorphosis‚ and puberty. These three typically occur in order and any deviation in this cycle results in heterochrony
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um in width. Many non-pathogenic mycobacteria are components of the normal flora of humans‚ found most often in dry and oily locations. M. tuberculosis is an obligate aerobe. For this reason‚ in the classic case of tuberculosis‚ MTB complexes are always found in the well-aerated upper lobes of the lungs. The bacterium is a facultative intracellular parasite‚ usually of macrophages‚ and has a slow generation time‚ 15-20 hours‚ and a physiological characteristic that may contribute to its virulence
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106 D) 4.5 × 105 E) 4.5 × 106 5. This procedure is for: A) Total cell count 1 B) Viable cell count C) Turbidimetric cell count D) Microscopic count E) Direct count 6. Bacteria from the tube (a) of figure right are: A) Obligate aerobes B) Obligate anaerobes C) Facultative aerobes D) Microaerophiles E) Aerotolerant anaerobes 7. Figure below shows how to ( a A) spread B) spread C) streak D) streak 8. a ) and the purpose is to ( b b evenly distribute cells isolate a single colony evenly distribute
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Melissa Babajko Microbiology 214BA Dr. May June 6‚ 2012 Staphylococcus aureus- Is a facultative anaerobic‚ Gram-positive‚ salt positive‚ cocci shaped bacterium. Staphylococcus aureus is found as normal part of the skin floral in the nasal passages and on the skin. An estimated twenty percent of people naturally have harmless Staphylococcus aureus on their skin and are long-term carries for Staphylococcus aureus. Staphylococcus aureus is the most common strand of Staphylococcus in humans to date
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Ch. 1 Prokaryotes = bacteria ‚ archaea Eukaryotes = Fungi‚ protozoa ‚ algae (Growth:: Mitosis有絲分裂) Bacterial cell → Bacillus(rodlike) ‚ cocus (spherical)‚ spiral (curved) *P.S. 有時會star-shaped or square → 出現既形式: pairs‚ chains‚ clusters cell walls of bacteria → peptidoglycan (carbohydrate & protein complex) cell walls of plant and algal cell → cellulose Growth::Binary fission = bacteria reproduce by dividing into two equal cells bacteria 吸收nutrients from dead / living organisms/ photosynthesis
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