Hypothesis: If substrate concentrations are changed, then as the concentration increase, the rate of anaerobic reaction will also increase, because the increase of the reactant concentration means there are more reactant particles, and there is a greater chance for these particles to collide and let reaction happen. The independent variable is the concentration of the substrate, and the dependent variable is the one will be measured, which is the volume of gas. The controlled variables are the temperature, the amount of yeast and water.Materials:Three envelopes of active dry yeastWaterSugarThree 500 mL bottlesThree Balloons (Medium-sized)Measuring CupsMeasuring SpoonsThermometreMeasuring
Once more alkali is added to this, the solution will begin to increase again in pH, going up to 12 – 14, and being blue/purple in colour through testing with indicator. This would be because there would then be more OH- ions. Hypothesis and prediction: Concentration of an acid affects the pH during a titration. As the concentration of the acid increases, I predict that the volume of alkali needed to change the pH to reach an end point will also increase. I also predict that doubling the concentration of acid will require double the amount of alkali to reach an end point.
Caudatum grows at a very steady pace. Aurelia grows at a faster rate because it can feed on more than one type of food. 6. Describe what happened when the Paramecium populations were mixed in the same test tube. Do the results support the principle of competitive exclusion?
Light: Jarvis (1964) found the transpiration rates for Quercus petraea seedlings were higher in unshaded treatments than shaded treatments. Humidity The transpiration rate of mushrooms was reduced by 87% through increasing the humidity of the storage container from 76% to 96% (Mahajan et. al 2007). Leave surface area Parker (1948) found the transpiration rates of loblolly pine and red cedar to increase directly through increased ratio of root surface to leaf surface area. 4.
e. Third World Countries are more productive than the U.S.. 2. Productivity can be increased in a manufacturing environment by: a. increasing production efficiency by increasing the standard times for jobs. b. reducing production labor costs and material costs. c. increasing the number of goods produced while holding all production costs constant. * d. only (b) and (c) e. (a), (b), and (c) 3.
Also, data showed that pea seeds had higher, more successful germination rates than bean seeds in cool temperatures. Overall, the hypothesis was supported by the data found in through the experiment and pea seeds should be grown in cooler temperatures, whereas bean seeds should be grown in warmer temperatures. Introduction: Seed propagation involves either the natural or assisted placement of seeds in favorable conditions to promote germination. By definition, germination is “the process by which a dormant seed begins to sprout and grow into a seedling under the right growing conditions” (www.biology-online.org). The purpose of this experiment was to investigate on which seeds have the highest germination rate in varying climatic temperatures.
Experimental Hypothesis: An increase in the temperature of water, in which beetroot tap root cylinders are bathed in for one minute, from room temperature (20 oC) to 70 oC will cause an increase in the amount of anthocyanin pigment in the solution (as measured by the colorimeter). Variables: * Independent: Temperature of the water bathing the beetroot cylinder * Dependent: The absorption of blue light by the anthocyanin in the solution (as measured by the colorimeter) * Controlled: Same beetroot is used to take the cylinder cuts, Size and dimensions of the beetroot cylinders, Volume of Water in which the beetroot is bathed, Length of time the beetroot cylinder is bathed Materials: * 1 large sized beetroot * Core Borer * Beakers * Measuring Cylinder * Test Tube rack * Test Tubes * Distilled Water * Colorimeter * 4 Water Heaters * Knife * Ruler * Thermometer * Stopwatch Method: 1. Get one large beetroot and with the use of the core borer cut 6 beetroot cylinders from the beetroot. Make sure to use the same sized core borer when extracting the cylinders. 2.
This test tube was placed in the spectrophotometer, every thirty seconds a reading was taken, this continued on for three minutes. After three minutes the tube was removed and cleaned. This process was repeated for runs 2, 3, and 4. for run 5a. through 5d. each tube was placed in a different temperature changing environment (freezing, cooling, heating and boiling).
It increases as the Earth’s atmosphere warms which makes it the most feedback mechanisms to the green house effect. Carbon Dioxide is released through natural activities like volcano eruptions and human activities like deforestation and burning of fossil fuels. We have seen that humans have increased their atmospheric CO2 concentration by a third since the Industrial Revolution. Methane is a hydrocarbon gas, which is produced through natural sources and human activities such as decomposition of wastes in landfills and rice cultivation. Methane is a more active green house gas than CO2 but is less abundant in the atmosphere.
Aim: Investigation how the difference in yeast concentration influence the rate of cellular respiration, during the reaction of respiration which product was ethanol and carbon dioxide. Hypothesis: If the yeast concentration is increased, then the amount of CO2 emitted will increase. This is because more yeast are able to produce ATP through cellular respiration. The more yeast are available, the faster the rate of cell respiration, and the more C02 that will be produced. This means the higher the concentration of yeast, the less time is needed to produce the same amount of CO2.