EFFECTS OF NITROGEN FIXING PEA PLANTS (Pisum sativum) ON GROWTH OF CORN (Zea mays) Introduction Interactions among plant species‚ particularly negative ones‚ have been a concern in agriculture (Levene 1926‚ Russell 1961). Novoa (1981) suggested that it would be advantageous to rotate certain crops by season‚ grow certain crops together‚ or avoid growing certain crops on the same land. Observations indicated that some crops require specific types of nutrients in contrast to other crop
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There are many ways in which substances can move across the cell membrane and in which then helps in the function of the body (cells‚ tissues and organs) overall. There are 3 processes that a substance can move across the membrane‚ theses are diffusion (simple and facilitated)‚ osmosis and active transport. Both diffusion and osmosis are passive processes‚ which mean they do not need energy to occur‚ whereas active transport does require energy. All three processes are involved in many functions
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The Effect of Gasoline Fumes on plants Introduction: This science fair project was conducted to study the effect of gasoline fumes on plants. The testing was done by placing plants beside a gasoline-filled container for different periods of time and temperatures. Hypothesis: Gasoline fumes cause plants to die - the longer the exposure to the fumes‚ the quicker the plants will die. Our second hypothesis is that exposure to fumes‚ at higher environmental temperatures‚ will result in quicker
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Almost all plants have roots that grow into the soil to help support its life. Roots are used by the plants to take nutrients and water out of the soil and send it through the plant. They also stabilize the plant. The root is made up multiple parts starting at the bottom with the root cap‚ then the zone of cell division next is the zone of cell elongation‚ and at the top of the root is the zone of differentiation. To figure out what section of the root has the highest number of cells in mitosis we
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Cytosine = Complementary base pairing rule - A strands of nucleotides joined by covalent bonds - The sequence of bases makes up the genetic code - These bases are ’read’ in groups of three - These triplets are used to send instructions in the cell: to switch genes on and off‚ to make proteins and enzymes Unit 3 Page 1 enzymes DNA is a double strand of polynucleotides The sugar-phosphate backbone is on the outside‚ the bases are on the inside The strand is held together by hydrogen
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project is to demonstrate how water temperature affects the dissolving of sugar in liquid. Everything in our universe is made up of particles which are in constant motion. In a solid state particles move the slowest while in a liquid state particles move the fastest. Under the right conditions‚ solid particles (the solute) when mixed in liquid (the solvent) can form a solution. This occurrence is called dissolving. I wanted to answer the question; does the temperature of water affect the speed at which
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investigate the effect of varying concentration of a differing glucose solution on the amount of osmotic activity‚ between the solution and a potato tuber of a given size. The purpose of this experiment is to demonstrate how living cells rely on osmosis‚ the diffusion of water. Osmosis is the movement of water molecules (H20) from a region in which they are highly concentrated to a region in which they are less concentrated. This movement must take place across a partially permeable membrane such as
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17th‚ October 2010 Margarita SA: VOL RATIO AND AGAR BLOCKS Conclusion: For this experiment the agar jelly had to be cut in to five different block sizes‚ after that has been done we had to add all five blocks in to the test tube with the acid and time to see how long it would take for the colour to change from a pinky purple to clear. From this experiment I learnt that the bigger the size of the jelly is the
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Effects of Plant Nutrient Deficiency Abstract This experiment aimed to determine the effects of nutrient deficiency on plants. This was done by examining tomato plants grown in a medium that contained all the nutrients needed to survive and comparing those results to plants that were grown in nutrient deficient mediums. The biomass and standard chlorophyll content were the focus of the experiment. The biomass was measured by taking the mass of the plant. The standard chlorophyll content was
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The cell‚ which is the smallest unit of life‚ is surrounded by a plasma membrane. The plasma membrane functions somewhat like a wall‚ as it keeps the internal contents from the external environment. Just like a wall‚ the membrane is also somewhat permeable‚ except that the membrane takes a much more active role in determining what is allowed in to the cell and what is kept out. The plasma membrane is a very thin structure‚ which has some very important tasks. One of the main tasks that it performs
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