INTRODUCTION A seed is a fertilized ovule that contains an embryo and transforms it into a new plant through the process of germination. Seeds remain inactive until conditions are right for germination. All seeds need water‚ oxygen‚ and proper temperature in order to germinate. However‚ some seeds require full light or darkness to germinate. According to Holm (1996) seeds have chemical inhibitors that prevent germination. A seed will not grow unless those inhibitors are destroyed by things like
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were not perfect so they all had to be recut later on which was not ideal. The process of transferring our planarians back and forth to their petri dish after being cut was very hard on the planarians as it required them to be pipetted up. This pipetting also affected our PZQ concentrations as it caused unequal amounts of spring water to be added to the petri dishes. In order for the experiment to provide more accurate results more planarians should be used and a more delicate and efficient transferring
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| SCIENCE - FORM 2 | | The World Through Our Senses | | SENSORY ORGANS AND THEIR FUNCTIONS 1. Sensory organs are used to detect every changes in the environment. (a) Sensory organs are possessed by human and all animals. (b) Sensory organs allow the body to respond to the stimuli surroundings. Stimuli from the surroundings. Stimuli are changes that happen in the environment. (c) Sensory organs have receptors that receive the stimuli and then‚ send them as impulses to the
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infection and few defensive tools. Penicillin was the first antibiotic‚ a discovery that happened in 1929 when a young bacteriologist‚ Sir Alexander Fleming‚ was tidying up his lab. After having been on vacation‚ he returned to work to find that a petri dish of Staphylococcus bacteria had been left uncovered; and he noticed that mold on the culture had killed many of the bacteria. He identified the mold as penicillium notatum‚ and upon further research found that it could kill other bacteria and could
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are used every year in the United States alone for scientific and commercial testing. Proclaimers say that there is no alternative for animal testing but at Procon.org people say different‚ “ In vitro testing‚ such as studying cell cultures in a petri dish‚ can produce more relevant results than animal testing because human cells can be
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CONTENTS Lamm Table of Content now needs to be re-arrange to match labs in body of manual. ORGANISMS IN THE ENVIRONMENT 2 DIFFUSION 3 OSMOSIS 4 PHOTOSYNTHESIS I (STRUCTURE OF THE LEAF) 6 PHOTOSYNTHESIS II (STARCH TEST ON LEAF) 7 PHOTOSYNTHESIS III (IMPORTANCE OF CHLOROPHYLL) 8 NUTRITION I (ENZYME ACTION) 9 NUTRITION II (FOOD TESTS) 11 FOOD TEST INSTRUCTIONS 13 RESPIRATION I (RESPIRATORY SUFACES) 15 RESPIRATION II (STRUCTURE OF A FISH GILL) 16 TRANSPORT IN PLANTS (TRANSPIRATION) 17 RESPONSE I (PUPIL
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The in vitro antibacterial activity was performed by agar disc diffusion method. Muella Hinton agar was prepared and autoclaved at a specified temperature and pressure. The medium was then cooled and 20mL of the medium was poured into a sterile petri dish and allowed to solidify. A sterile wire loop was used to transfer a colony of test organisms into a test tube with 2mL peptide water. A swab stick was dipped into the test tube containing the organisms and it was used to seed the organism on the
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organism by filling a graduated cylinder with 25 mL of water and noting if there is an increase in volume above the 25 mL line. Record volumes in table. After placing the organisms in their proper beakers cover each beaker with plastic film or petri dish. Cover the beaker containing the elodea with a coffee can or aluminum. Allow them to respire for about fifteen minutes. After fifteen minutes remove the organisms from the beakers and return them to their original bowls. Add four drops of phenolphthalein
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Extended Experimental Investigation | May 28 2013 | Drosophila melanogaster lab experiment Question: How do the dominant or recessive genes in particular traits in a cross between a male and female Drosophila determine the traits of its offspring? Aim: to establish whether characteristics produced from the offspring of a drosophila cross are recessive or dominant traits. Hypothesis: If certain phenotypes are expressed in the offspring from the cross of certain Drosophila‚ then the determination
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possibly help the sick live a little longer. It never occurs to parents that sometimes‚ you just aren ’t a genetic match to be a donor for your child or loved one. Some people take matters into the own hands‚ and genetically conceive a child in a petri dish‚ resulting in a genetic match for their sick child or loved one. Some people know this process as "Designer Babies". Designer Babies offer many pro ’s to their families: genetic matches‚ preventing diseases‚ guaranteed to have the characteristics
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