cylinders of potato were removed from a petri-dish and placed on the tile provided. One end of each was cut to a 90 degree angle‚ then cut all to the same length of 30mm 4) One potato cylinder was put in each test-tube and was covered with 3m masking tape provided‚ then the exact time was labeled: 11:39 a.m. 5) Potato Tissue was left for approximately 21 hours and removed from the test-tube afterwards. 6) The contents of each test-tube were poured into a petri-dish and the cylinder removed and blotted
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pipette‚ transfer it to the centre of a small‚ dry Petri dish. With filter paper remove excess water from around the specimen so that it is completely stranded. 2. With a seeker place a small blob of silicone grease onto the floor of the Petri dish. Then wipe the needle clean and use it to gently push the posterior end of the animal into the grease so that it is firmly anchored. Now fill the Petri dish with water at 300C. 3. Place the Petri dish on the stage of a microscope and observe the animal
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In-vitro fertilization. Meaning that they have to overcome a process by which the egg is fertilized by the sperm outside of the body‚ and placed into a petri dish. Then they would have to monitor and stimulate a woman’s ovulatory process‚ and then would have to remove an egg from the woman’s ovaries and let the sperm fertilize with the egg within the petri dish. Then they would have to remove a single cell from the embryo within the first 5 days after its creation. Then after that‚ they would have to test
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AP Lab Seven Genetics of Organisms Dan Torres AP Biology Block 1 January 24‚ 2011 Introduction & Background Fruit flies have made a huge contribution towards knowledge about genetics‚ but for most people‚ they are just annoying insects that are attracted to their fruit. Their scientific name is Drosophila melanogaster‚ and to scientists‚ they have been a key to understand many principles of heredity including sex linked inheritance‚ epistasis‚ multiple alleles‚ and gene mapping. Fruit
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A2 BIOLOGY CORE PRACTICAL SUMMARY Name of practical Independent & dependent variables Observing patterns by Ecological sampling Random sampling Systemic sampling Other variables to be controlled Abiotic factors e.g. light‚ temperature‚ soil water‚ humidity‚ O2 concentration‚ pH‚ aspect‚ slope angle equipment Gridded Quadrat Tape measure Point quadrat Pitfall trap Sweep Net Pooter Tullgren funnel Baermann funnel Method and outcome Several methods. 1 random sampling = set up grid using
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Effects of Alcohol‚ Caffeine‚ and Temperature on the Heart Rate of Daphnia magna Joseph Ezra Gallo BY124L MW 8:30-11:30 Introduction Ectothermic animals are animals whose body temperature is affected by their surroundings. This means that if the environment is cold the animal will be cold. If the environment is warm the animal will be warm. This is because the animal doesn’t have the capability of regulating its body systems to keep a constant body temperature. When an ectothermic animal is
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Your Full Name: Lauren Sinay UMUC Biology 102/103 Lab 1: Introduction to Science INSTRUCTIONS: On your own and without assistance‚ complete this Lab 1 Answer Sheet electronically and submit it via the Assignments Folder by the date listed in the Course Schedule (under Syllabus). To conduct your laboratory exercises‚ use the Laboratory Manual located under Course Content. Read the introduction and the directions for each exercise/experiment carefully before completing the exercises/experiments
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Introduction “The consumption of oral creatine monohydrate has become increasingly common among professional and amateur athletes” (Poortmans and Francaux‚ 2000). Creatine is a substance used by athletes and bodybuilders to increase the production of Adenosine Triphosphate (ATP)‚ which gives them the energy they need to perform. In this experiment‚ creatine is added to water and its effects on Daphnia is tested. By observing the heart rate‚ one can determine if the creatine increases or decreases
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gloves and eyewear. Next we gathered all our materials and that includes two Petri dishes‚ universal indicator‚ apple with skin‚ plastic bottle
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for a small amount of the ecoli bacteria to be poured into the agar (after all even just one single microorganism can reproduce into a full colony). Once the bacterium is grown to its full potential the broths will be swabbed into Petri dishes with agar in them. The Petri dishes will be given time for the bacteria to grow. If the bacteria grows in any of the dishes it will be swabbed and placed into a new
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