Significance of Planarians Planarians are non-parasitic flatworms of the phylum Platyhelmintes found in fresh water like ponds or lakes. In my research paper I focused on Schmidtea mediterranea planarians found in Tusinia and southern Europe which are extensively used as a model organism to study development and regeneration process (Newmark 2012). Schmidtea mediterranea are chosen by researcher in molecular biology and genetics field because these planarians have diploid chromosomes and are hermaphrodite
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Planaria are commonly known as flatworms. Ordinarily‚ these flatworms tend to stay near the edges or walls (Akiyama & Shitaro). They receive oxygen through their skin. They may not look like humans but their reactions to certain drugs or stimulants are quite similar to those of humans. Caffeine is known to increase individual’s energy and physical activity‚ leading to the question of how different concentrations of caffeine would affect planaria’s physical activity. Low doses of caffeine enhance
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Planaria Regeneration in Ideal Temperatures vs. Cold Temperatures Christina Malfas Abstract Planaria are flatworms that live in quiet freshwater bodies. They live in a narrow range of temperatures‚ from 22-24°C. They regenerate asexually‚ specifically through a process called epimorphosis‚ in which they completely regenerate one half of their bodies after splitting themselves in two. The diffusion gradient model assumes that cells in an organism “know” their orientation on that organism due
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of planaria cells after a portion of their bodies was cut off. Background: 1. A blastema is a group of cells that forms at the site of a wound that eventually turns into the missing parts of a planaria. 2. Planaria fission occurs when a planaria is missing body parts. The organism attaches its tail-end to the ground and pulls itself forward using its head-end in order to tear itself into two parts. Then‚ each of these parts grows back the missing half‚ producing two new identical planaria. 3
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Alec Long 3/29/13 2nd Hour How do Different Light Wavelengths Affect Planaria? 1. Background Information * Non-parasitic flatworm * Some have 2 eye spots‚ while others have several more * Move away from light * Have three germ layers- estoderm‚ mesoderm‚ and endoderm 2. Problem How do different light wavelengths affect Planaria? 3. Independent Variable Color of light 4. Dependent Variable Reaction to light 5. Experimental Group Group that receives
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Evrhett Davis‚ Andrew Staub Saint Joseph’s University Organismal Lab Tuesday Dr. Jonathon Fingerut December 1‚ 2013 Thigmotaxic Variation Between Cephalic and Caudal Regions in Planaria The development of a centralized nervous system in primitive animals provided a significant advantage resulting in the continuance of many species. Nervous tissue allowed organisms to expand into new methods of predation‚ protection and reproduction; encouraging specialization and eventually increased
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Platyhelminthes Experimental Design: Planaria are free-swimming mostly freshwater flatworms. Flatworms are very unique creatures because they regenerate lost parts. My groups experiment was‚ The Effect of Darker Regions on Planaria Movement. The purpose of this experiment was to see whether or not the planaria preferred the white region or the dark region. My hypothesis was‚ If the Planaria are placed on the white side then they will move to the dark side because the planaria have a strong negative geo-tropism
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the selected four invertebrates and familiarize ourselves with their taxonomic levels through the organism’s mechanisms of feeding‚ motility‚ and reproduction. Our group used the prior knowledge we possessed about the Hydra‚ Rotifer‚ Gammarus‚ and Planaria organisms to complete the lab. We knew that all of these small invertebrates have a freshwater habitat. Each organism differs in taxonomic levels from Genus to Species. We knew that the Hydra reproduces with one of two methods: 1) by “budding” which
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microscope our objective was to learn how to use a dissecting microscope properly to view a penny and a Planaria. Penny: While observing the penny under 20x magnification I observed that on the tail side a penny Lincoln is sitting in the Lincoln Memorial. While viewing the penny with the naked eye it is nearly impossible to determine that Lincoln is sitting in the Lincoln Memorial. Planaria:
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Abstract Planaria belong to the class Turbella of the phylum Platyhelminthes. This paper depicts the behavioral reaction of Planarians to a variety of settings and compounds to better understand this particular Platyhelminthes. With a plastic syringe‚ it is possible to extract a sample of planaria‚ place into a Petri dish with enough freshwater and observe under a laboratory provided microscope. While on the microscope platform‚ expose your sample to light and darkness to notice the patterns of
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