The instructor will provide TSA plates (Tryptic Soy Broth mixed with 15% agar‚ heated to sterilize media and melt agar then poured into a Petri dish) and a culture containing Escherichia coli and/or Bacillus subtilis and/or Staphylococcus aureus and/or Serratia marcescens. Isolation of bacteria using the streak plate technique: Label the bottom of a Petri dish (side containing the agar) (Why?) with your initials‚ date and lab section. Your instructor will provide you with a test tube containing
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Experiment on Metals Aim-To find out which of these metals will be most reactive with hydrochloric acid‚and plan an investigation to test it out.The Metals given:Calcium‚Aluminium‚Iron‚Magnesium and Zinc. Prediction-I predict that the metal will be the most reactive with hydrocholoric acid is calcium because calcium is in Group 2 which is the alkaline earth metals in the periodic table and because calcium is at the extreme left side of the periodic table and as you go across a period‚the element
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No changes occurred within the Nutrient agar. The MKL agar exhibited a color change with E. coli and the mixed culture. The agar changed from red to purple‚ and a noticeable border was present surrounding the colonies that exhibited growth on the dish. The ASH agar did not yield a color change. The Mannitol agar exhibited a change with S. aureus and the mixed culture‚ but no change with E. coli (Table 2). Table 2. Indication of color change within the four types of agar. E. coliS. aureusMixed
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Cloning should not be used to replicate animals or species. Cloning is a way to override I God’s plan for the world. It is altering what is meant to be. Clones are organisms that are exact genetic copies. Every bit of their DNA is identical. Cloning is a process in which DNA from one animal is put into another to make a baby that is a clone of the animal that the scientists want. That is to put it simply. There are two different types of cloning. One of the types is artificial embryo
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1.According to the kinetic theory‚ both the particles in gases and the particles in liquids have kinetic energy. This energy allows the particles in gases and liquids to flow past one another‚ as shown in Figure 13.5. Substances that can flow are referred to as fluids. The ability of gases and liquids to flow allows them to conform to the shape of their containers. Figure 13.5 Both liquids and gases can flow. The liquid on the left is colored water. The gas on the right is bromine vapor. If a
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University of Bahrain College of science Department of biology The Effect of Salinity on Seed Germination 1) Abstract: Poor seeding growth can be the result of soil salinity. A study was done to examine the influence of NaCl salinity treatment on the germination and seeding grow of vigna radiata using different NaCl concentration 0 (control) ‚ 0.25 ‚ 0.5 ‚ 1.0 ‚ 1.75 . A graph was used to analyze the data obtained from the study. Important differences among the treatment
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of pH or the lack of heat. Hypothesis A reused and ground enzyme will have the greatest reactions compared to the other types of enzymes. Materials 1. Avocado 2. Petri Dish 3. Hydrogen Peroxide 4. Vinegar 5. Vinegar Substrate Procedure 1. Place a small piece of cooked avocado/avocado/soaked avocado in a Petri dish. 2. Place 10 drops of hydrogen peroxide/vinegar substrate on the avocado 3. Observe for enzyme activity by looking for bubbles 4. Rate the amount of oxygen bubbles produced
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marcescens. Sterile petri dishes Liquid nutrient agar Sterile filter paper disc PROCEDURE i. The bottom of a petri dish has been labeled with the name of the organism‚ the chemical agent and name and date of experimenter and experiment respectively. ii. One or two loopfuls of the organism has been taken from the cultures provided and a tube of liquid nutrient agar has been aseptically inoculated at 50oC. The mixture has been poured into a sterile petri dish. iii. When
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bag White beans‚ “N” shaggy fur Brown beans‚ “n” no fur 3 Petri dishes III. Methods: i. Obtain a gene pool containing 50 normal genes (N) and 50 defective genes (n). ii. Record and calculate the initial frequencies on the data chart. Write a hypothesis above the data table that predicts what will happen to the frequency of the defective gene over four generations. iii. Label one Petri dish “N” and one “n”. Label the third dish “graveyard”. iv. Shake the bag containing all the genes in order
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Can Planaria Retain Memory During Regeneration? Zoology 225 Submitted by: Abbie Danner Submitted to: Mrs. Godar May 5‚ 2015 Abstract The experiment was performed to find out if planarian can retain their memory after regeneration? The object was to discover if shocking a planarian and then shining a light on it for eight weeks‚ could be imprinted on each side of the planarian after being cut in half and left to regenerate. Once the planaria were left to regenerate for a week at the end
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