Definition of Microorganism Microorganism (from the Greek: mikrós‚ "small" and organismós‚ "organism") is an organism that is microscopic (usually too small to be seen by the naked human eye). Microorganisms live in all parts of the biosphere where there is liquid water‚ including soil‚ hot springs‚ on the ocean floor‚ high in the atmosphere and deep inside rocks within the Earth’s crust. Microorganisms are critical to nutrient recycling in ecosystems as they act as decomposers
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LIFE ON EARTH REVISION Analysis of the oldest sedimentary rocks provides evidence for the origin of life. - Identify the relationship between the conditions on early Earth and the origin of organic molecules. - Formation of the organic molecule was the first event in the evolution of life. - The molecules provided a building block for cell formation and the food for the earliest life. - Present day life’s atmosphere contains: - Oxygen - Water - Carbon
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Clark Honors Bio Period 3 10-19-13 Eukaryotic Cell vs. Prokaryotic Cell Eukaryotic cells do have a nucleus but Prokaryotic cells do not. Prokaryotic cells usually only have one chromosomes when Eukaryotic cell have more than one. Eukaryotic cells have mitochondria but Prokaryotic cells do not. Prokaryotic cells are usually unicellular and Eukaryotic cells are usually multicellular. Also Eukaryotic cells are larger than Prokaryotic cells. Both Eukaryotic and Prokaryotic cell have vacuoles. Both
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classification for living organisms‚ including the prokaryotic Monera and the eukaryotic Protista‚ Fungi‚ Plantae and Animalia is complicated by the discovery of archaebacteria. The prokaryotic Monera include three major divisions: The regular bacteria or eubacteria; the cyanobacteria (also called blue-green algae); and the archaebacteria. Lipids of archaebacterial cell membranes differ considerably from those of both prokaryotic and eukaryotic cells‚ as do the composition of their cell walls and the sequence
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a new mother to a 3-month old son name Greyson and one of my daily routines is to drop Greyson off at daycare‚ attend classes and then pick up Greyson from daycare to head back home. When driving‚ I have gotten to know the route quite well that it is quite possibly I could go on automatic when in reality I shouldn’t. One day‚ I really needed to go to the bank to deposit a check into my account. While I was attending my classes and then checking up on Greyson on my break in-between class I reminded
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Each one have there own merits and evidence supporting. These theories suggest the evolution of cells from the most primitive prokaryotes‚ unicellular organism having cells lacking membrane-bound nuclei‚ to the most complex eukaryotes‚ single or multicellular organisms with a membrane enclosed nucleolus and organelles. * The Three Domain Hypothesis refers to the proposal by Carl Woese in 1990 that; archaebacteria form a monophyletic group‚ this clade is sufficiently different from
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Pre-lab questions: 1. Algae belong to what Kingdom? They belong to the Kingdom Protista. 2. What are the three types of multicellular algae? The three types if multicellular algae are chlorophyta which are green algae‚ phaeophyta which are brown algae‚ and rhodophyta which are red algae. 3. Are algae autotrophs or heterotrophs? Algae are autotrophs. 4. What organelle allows plants (and plantlike protists) to photosynthesize? The chloroplasts allow plants and plantlike protists to photosynthesize
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Contents Page Page 1 Contents Page Page 2 Introduction Page 3 Introduction (cont.) Page 4 Diagrams of animal cell‚ plant cell and bacteria cell Page 5 Table of Organelles Page 6 Table of differences between Prokaryotic and Eukaryotic cells Page 7 (a‚b‚c‚d) Cell drawings of onion cells and cheeks cells Page 8 Electron micrograph of an animal cell Page 9 List of four tissue types with diagrams Page 10 List of four tissue types with diagrams (cont.) Page 11
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to study basic cell function and multicellular development‚ undergoes a 24-h asexual life cycle comprised of both single-cell and multicellular phases. As a result‚ it is an excellent system for studying a variety of cellular and developmental processes such as‚ chemotaxsis‚ lysosome function and signaling. In nature‚ Dictyostelium feeds and grows as single cells. When induced by starvation‚ cells undergo chemotactic aggregation towards cAMP to form a multicellular aggregate (i.e.‚ a mound)‚ which
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There are no multicellular plants in the oceans Most are photosynthetic single cells Cambrian is in Paleozoic era Called Cambrian explosion‚ because in this 70 million years. We have an explosion of every multicellular organism. Wednesday October 31st‚ 2012 CAMBRIAN Phanerozoic Eon Eras: Paleozoic (most recent : 550 Ma until now) – multicellular organisms in the oceans The periods in the Paleozoic era are: Cambrian Ordovician: end is one of the 5 mass extinctions. So many organisms
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