Chapter 35 Plant Structure‚ Growth‚ and Development Lecture Outline Overview: Plastic Plants? • The fanwort‚ an aquatic weed‚ demonstrates the great developmental plasticity that is characteristic of plants. o The fanwort has feathery underwater leaves and large‚ flat‚ floating surface leaves. o Both leaf types have genetically identical cells‚ but the dissimilar environments in which they develop cause different genes involved in leaf formation to be turned on or off.
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The rice plant has tillers which are a characteristic of grass plants; however they have recognized a way of growing the plant which causes it to create the best grain possible. Discussion: Vegetative: In this stage the plant germinates and gradually grows taller and leaves emerge at steady intervals. Germination: The root elongates through the seed coat and anchors into the soil. The primary leaf (coleoptile) also elongates and breaks through the seed coat. Early seedling growth: The first
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radiation We can classify radiation into ionizing and non-ionizing radiation‚ according to the effects it produces on matter. Ionizing radiation includes cosmic rays‚ X rays and the radiation from radioactive materials. Non-ionizing radiation includes ultraviolet light‚ radiant heat‚ radio waves and microwaves.In medical practice ultrasound and magnetic resonance imaging (MRI) involve non-ionizing radiation. +light n heat radiation produced by the sun *ionizing radiation is produced by some
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How the Addition of Extra Sugar Affects the Growth of Plants Lacey Fish Florence Nguyen Danielle Wang Julia Wu Botany 10MWF April 4‚ 2006 Materials: 1. 20 Mung beans 2. 4 plastic cups 3. soil 4. Turbino sugar 5. Distilled water 6. Beakers 7. Graduated cylinders 8. Stir plate 9. Scale 10. String 11. Ruler with cm measurements 12. Stir bar Background: We chose this project because we were curious to see how the amount of raw sugar
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negative effects to the human body‚ it is a drug like substance‚ overuse of caffeine can lead to addiction. Just like many other drugs and drug like substances‚ Caffeine increases happiness and comfort. Caffeine also has some positive effects on the human body; it can lower the risk of having heart disease‚ diabetes‚ strokes‚ and cancer.
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MWF 8:30-9:30 ULTRAVIOLET-VISIBLE SPECTROMETRY A diagram of the components of a typical spectrometer are shown in the following diagram. The functioning of this instrument is relatively straightforward. A beam of light from a visible and/or UV light source (colored red) is separated into its component wavelengths by a prism or diffraction grating. Each monochromatic (single wavelength) beam in turn is split into two equal intensity beams by a half-mirrored device. One beam‚ the sample beam
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experiment was composed to show the effects that different colors of light have on plant growth. We separated our plants into different boxes and then covered the openings with colored cellophane. We conducted this experiment for approximately two weeks. Out of the colors blue‚ green‚ red‚ and yellow‚ the plant behind the blue cellophane grew the most. Research Problem What effects does different color light have on plant growth? Hypothesis The plants will grow taller under the red and blue
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THE ALLELOPHATIC EFFECT OF PLANTS Raluca Elena Hedes STRUCTURE: PART 1: Clarifying THEORETICAL CONCEPTS and TERMINOLOGY ¨ PART 2: Aspects of PRACTICAL APLICABILITY ¨ PART 3: SOURCES ¨ PART 4: Q&A ¨ The term allelopathy… ¨ ¨ • • 1937 – introduced by Prof. Hans Molisch Derived from the Greek words: Allelon = of each other Pathos = to suffer Definition ¨ 1996 - The International Allelopathy Society: “Any process involving secondary metabolites
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The Effect of Water on Germination and Plant Growth in Marigolds Question: How does the amount of water given to a plant affect how much it grows? Hypothesis: If I give water to a marigold seed then it will germinate and the plant will grow more than a seed not given water. Independent Variable (IV): the amount of water given a seed/plant Dependent Variable (DV): the amount of plant growth Control Group: The group of plants given water Experimental Group: The group of plants given no water
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Technical Specification Sheet For UV-Spectrophotometer | | Wavelength range | 190 to 1‚100 nm | Spectral bandwidth | 1 nm (190 to 1‚100 nm)/ variable Low stray light < 0.12%T (220 nm‚ NaI 340nm‚ NaNO2>2.0 Abs) | Wavelength accuracy | ± 0.1 nm at D2 peak 656.1 nm‚ | | ± 0.3 nm for entire range | Reproducibility | ±0.1 nm | Resolution | 1 nm more than 6 wave lengths | Photometric system | Double beam optics | Photometric range | Absorbance: -4 to 4 Abs | | Transmittance:
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