purpose of this study was to observe the effect of different concentrations of sodium chloride have on the germination of lettuce seeds‚ Lactuca sativa. A study done by Katembe et al.‚ (1998) stated that an increase in salt solution in the environment of the seed will slow down water imbibition‚ therefore‚ preventing germination and root growth. The prediction for this experiment was that lettuce seeds‚ Lactuca sativa‚ having a higher concentration of salt in their environment will have a lower germination
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evidence that osmosis did occur in the bags. The largest change in mass was in the 1.0M sucrose bag the mass went from 12g initially to 14.2g‚ this gained 2.2g‚ an 18.3% change in mass for the group data over the duration of the experiment. The 0.2M bag went from 10.2g to 10.9g a 6.9% change in mass; the 0.4M bag went from 12.1g to 12.2g .83% change in mass; the 0.8M bag went from 10.9g to 12.2g and an 11.9% change in mass. During osmosis water diffuses‚ going from an area of low concentration of solute
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Lab Report (Effect of concentration on enzyme activity) Biology Noor Alawadhi 11- KC Introduction: An Enzyme is a protein‚ which is capable of starting a chemical reaction‚ which involves the formation or breakage of chemical bonds. A substrate is the surface or material on or from which an organism lives‚ grows‚ or obtains its nourishment. In this case it is hydrogen peroxide. This lab report will be explaining the experiment held to understand the effects of the changes in the amount of
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Total CO2 Evolved by Different Concentrations of Convollaria roots. Actual values are the graduated pipette readings. For CO2 evolved values‚ subtract the initial reading from the actual reading. This is the amount of CO2 accumulated over time. | Time (min) | Tube 1 | Tube 2 | Tube 3 | Tube 4 | | Actual | CO2 Evolved | Actual | CO2 Evolved | Actual | CO2 Evolved | Actual | CO2 Evolved | | (A) | (A-I) | (A) | (A-I) | (A) | (A-I) | (A) | (A-I) | Initial reading (I) | 0.05 | | 0
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Introduction Diffusion and osmosis are two types of passive transport. Diffusion is a random movement of molecules from an area of high concentration to an area of low concentration. Osmosis is a type of diffusion that diffuses water through a selectively permeable membrane. There were two parts to the experiment‚ the dialysis tubing lab and the potato lab. In the first experiment‚ the dialysis tubing acted as a semi-permeable membrane. A semi-permeable membrane is a membrane
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officially ban. Modern audiences have become accustomed to attitudes‚ language‚ and stories that are political‚ graphic‚ violent‚ and more than just a little bit avant garde. Obviously‚ such was not the case in the blacklisting days of the 1950s! “Salt of the Earth” violated every aspect of the white‚ middle-America‚ conservative mindset of 1954. As a political statement‚ it demonstrated the inter-connection that exists between working class‚ feminist‚ environmental and Latino concerns‚ and yet it
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BAD EFFECTS OF CELL PHONE ON SOCIETY A report by the International Telecommunication Union (ITU) said there were about six billion cell phone subscriptions at the end of 2011-roughly one for 86 of every 100 people. Up to now‚ this number has continued to increase dramatically. This proves certainly that cell phone affects our society more strongly and more deeply in many aspects. No one can deny that cell phone is playing a very important and necessary role in our society because it not only
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Osmosis The purpose of this lab is to study how membranes of plant and animal cells react when exposed to different solutions. The first experiment involves purple onion skin and the second involves rat blood in various solutions. I needed to understand certain terms before preforming this lab to be able to efficiently explain what is happening to the cells. Diffusion is the tendency of a substance to move down its concentration gradient from a more concentrated to a less concentrated area.
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vitamins are water-soluble. Fat-soluble vitamins are absorbed through the intestinal tract with the help of fats (lipids). Another name for Vitamin A is retinol and its deficiency may cause night-blindness and keratomalacia. Liver‚ carrot‚ sweet potato and pumpkin are some sources of Vitamin A. Thiamine is chemical name for
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ABSTRACT An experiment was carried out at the Horticulture Farm‚ Bangladesh Agricultural University‚ Mymensingh during 1998-99 growing season to study the effect of nitrogen and plant spacing on the growth and yield of potato (var. Diamant). Different nitrogen levels viz. 0‚ 127.0‚ 190.5 and 254.0 kg N/ha significantly influenced plant height‚ foliage coverage‚ number of main stem per hill‚ days required for 80% maturity of the crop‚ fresh weight of haulm (g/hill)‚ number of tubers per hill‚
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