Student’s Name Professor’s Name Course Date Biology 110 Laboratory 3 – The Scientific Method Template Exercise 1 Section 1 Task 1: Observation Six biological observations made and mentally noted over the last few days on the six lines in the Scientific Method Template. 1. Lobster shells turn red when heated. 2. Birds flock together and migrate south. 3. Most people have several strands of gray hair. 4. The coat of a dog becomes heavier as the weather conditions change. 5. Leaves in a tree behind
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Plant-based dyes such as wood‚ indigo‚ saffron‚ and madder were raised commercially and were important trade goods in the economies of Asia and Europe. Across Asia and Africa‚ patterned fabrics were produced using resist dyeing techniques to control the absorption of color in piece-dyed cloth. Dyes from the New World such as cochineal and logwood were brought to Europe by the Spanish treasure fleets‚ and the dyestuffs of Europe were carried by colonists to America. According to Bhuyan and Saikia‚ After a
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CHROMOTOGRAPHY Chromatography is used to separate mixtures of substances into their components. All forms of chromatography work on the same principle that they all have a stationary phase (a solid or a liquid supported on a solid) and a mobile phase where liquid or a gas is involved. The mobile phase flows through the stationary phase and carries the components of the mixtures with it. Different components travel at different rates. In paper chromatography‚ the stationary phase is a very uniform
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Cell structure and organization • Chloroplasts o Site of photosynthesis where light energy is absorbed o Consist of grana which are stacked up to increase surface area for absorption of light o Only present in plant cells • Cell membrane (plasma membrane) o Lipid bilayer that surrounds the cell‚ interspersed with protein molecule o Presence of temporary pores o Selectively permeable Controls movement of substances o Diffusion‚ osmosis and active transport can therefore take place o Prevent outflowing
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Plants Biotechnology In this experiment I will be making a healthy tea for the human kind. First I would get a dry leaf from a “Moringa” Tree‚ then I will blend the leafs in blender. I would but the triturated leafs in a tea bag. So people will try them out. Now I am going to tell you what does the Moringa tea do to you. The moringa tea is healthy in many ways. The reasons why you should drink it is cause it increases the defenses of the body‚ lowers the wrinkles and fine lines‚ promotes
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Variagated Leaves Total absence of plastid pigments causes a sector of a leaf or stem to have white patches. This condition is termed variegation (Metrosideros). Variegation is produced when there is a cell mutation (cytological chimera)‚ and all cells produced from that mutant mother cell lack the pigments‚ either because plastids are not present or the plastid cannot complete the manufacture of the pigment apparatus. White‚ therefore‚ is where color is missing. The zones where chloroplasts are
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The evolutionary relationships among cyanobacteria‚ red algae‚ brown algae‚ green algae‚ and flowering plants‚ observed from the results their photosynthetic pigment patterns using thin layer chromatography technique Introduction Endosymbiosis is a process where unicellular organisms engulf other cells resulting a life form that one or both cells are dependent on each other (Campbell et al.‚ 2008). Strong evidence suggests that different types of photosynthetic cyanobacteria underwent endosymbiosis
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compounds. There are two phases in photosynthesis‚ the light reaction and dark reaction. The following experiment tested only the light reaction. Photosynthesis takes place on the chloroplast‚ and the chloroplast contains chlorophyll pigments which absorb light energy. Pigments are particular to different wavelengths. The following experiment helped determined the fastest photosynthetic reaction rate from wavelength ranging from 450‚ 545‚ 650‚ and 750 nm‚ and intensities 3‚ 7‚ 15‚ 35‚ and 150 uEinsteins/m^2/sec
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Problem How can you tell pigment separation by using Chromatography? Objective To prepare a chromatogram‚ separate pigments in a leaf and interpret the chromatogram. Hypothesis If I am to put a chromatography paper into a solvent‚ then it would separate the pigments depending on their Rf value. I think the pigments will separate in this order: Chlorophyll A‚ Chlorophyll B‚ Carotene‚ and Xanthophyll. Introduction Chlorophyll is the molecule that absorbs sunlight and uses its energy
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Lambda 40. As well as to determine the absorption spectrum of a solution and to prepare a Beer’s Law Plot. In the spectrometer used‚ the light source is imaged upon the sample. A fraction of the light is transmitted or reflected from the sample. The light from the sample is imaged upon the entrance slit of the monochromator. The monochromator separates the wavelengths of light and focuses each of them onto the photo detector sequentially. The absorption spectrum is determined to select the optimal
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