PRESCOTT'S MICROBIOLOGY
11th Edition
ISBN: 2818440045677
Author: WILLEY
Publisher: MCG
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Chapter 29.3, Problem 1CC
How do radioactive and stable isotopes differ? Design an experiment to determine whether or not denitrification is taking place in a soil ecosystem.
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The practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Why would nitrogen-fixing plants be plowed under instead of harvested?
a) To increases usable nitrogen in the soil.
b) To increase water retention.
c) Nitrogen-fixing plants are not a food crop.
d) To decrease bacteria in the soil.
The practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Crop rotation would allow the farmer to reduce which of the following?
a) Planting seeds.
b) Watering the fields.
c) The use of manufactured fertilizer.
d) The burning of fossil fuels by farm equipment.
Discuss the following prompt:
In this experiment, we are looking to see how much different types of soil will affect the time it takes for pinto Bean seedlings to germinate out of the ground. The scientific name of a pinto bean is Phaseolus vulgaris. Pinto beans are kind of beans people usually eating, and people commonly use pinto beans in many dishes, such as rice and pasta. Planting pinto beans need many necessary factors, however, I think the type of soil is the most important one to grow it faster. Pinto beans are kind of plants can grow in dark and dry area, so even in dark (less light), they can grow as well. The goal is to determine that soils have different characteristics that can help or hurt plant growth.
In order to discover the effects soils have on plant growth, three different soil samples will be used in a controlled study. The samples will vary in consistency, texture, color, location, moisture, and contact with human life to ensure that the samples are…
Chapter 29 Solutions
PRESCOTT'S MICROBIOLOGY
Ch. 29.1 - What happens to the flow stream in fluorescence...Ch. 29.1 - Prob. 1CCCh. 29.1 - Prob. 2CCCh. 29.1 - Describe the rationale upon which the extinction...Ch. 29.1 - Prob. 4CCCh. 29.2 - Prob. 1MICh. 29.2 - Prob. 1CCCh. 29.2 - Prob. 2CCCh. 29.2 - Prob. 3CCCh. 29.2 - Prob. 4CC
Ch. 29.3 - How do radioactive and stable isotopes differ?...Ch. 29.3 - Prob. 2CCCh. 29.3 - Prob. 3CCCh. 29.3 - Prob. 4CCCh. 29.3 - What is the difference between MAR and MAR-FISH?...Ch. 29 - Prob. 1RCCh. 29 - Prob. 2RCCh. 29 - Prob. 3RCCh. 29 - Prob. 4RCCh. 29 - Prob. 5RCCh. 29 - Prob. 6RCCh. 29 - Prob. 7RCCh. 29 - Prob. 8RCCh. 29 - Prob. 9RCCh. 29 - Prob. 10RCCh. 29 - Prob. 11RCCh. 29 - How might you attempt to grow in the laboratory a...Ch. 29 - Both acetate and CO2 can be used by methanogenic...Ch. 29 - Prob. 3AL
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- Discuss the following prompt: In this experiment, we are looking to see how much different types of soil will affect the time it takes for pinto Bean seedlings to germinate out of the ground. The scientific name of a pinto bean is Phaseolus vulgaris. Pinto beans are kind of beans people usually eating, and people commonly use pinto beans in many dishes, such as rice and pasta. Planting pinto beans need many necessary factors, however, I think the type of soil is the most important one to grow it faster. Pinto beans are kind of plants can grow in dark and dry area, so even in dark (less light), they can grow as well. The goal is to determine that soils have different characteristics that can help or hurt plant growth. In order to discover the effects soils have on plant growth, three different soil samples will be used in a controlled study. The samples will vary in consistency, texture, color, location, moisture, and contact with human life to ensure that the samples are…arrow_forwardThe practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Why would nitrogen-fixing plants be plowed under instead of harvested? * To increase water retention. Nitrogen-fixing plants are not a food crop. To increases usable nitrogen in the soil. To decrease bacteria in the soil.arrow_forwardSoil microorganisms, collectively referred to as dizotrophs, fix 90% of the inert nitrogen gas to ammonium and nitrate. There are two-main types of nitrogen-fixing bacteria: free-living (nonsymbiotic) and mutualistic (symbiotic). Describe the mutualistic relationship between Rhizobium and legumes. What is the advantage of using legumes as a cover crop in agricultural systems? A point of interest is that the nitrogenase enzyme complex is highly sensitive to oxygen. This is a major problem for free-living aerobic species such as cyanobacteria and species of the genera Azotobacter and Beiigrinckia. Describe two ways the bacteria can overcome to levels of oxygen in their cells.arrow_forward
- Consider figure 49.8 in the textbook. Note the red versus blue squares and the red versus blue bars in the graph. Please choose all applicable options. a.The difference in color (red versus blue) corresponds to a difference in an abiotic factor. b.The difference in color intensity (dark red versus light red) corresponds to a difference in a biotic factor. c.The difference in color (red versus blue) corresponds to a difference in a biotic factor. d.The difference in color intensity (dark red versus light red) corresponds to a difference in an abiotic factor.arrow_forwardThe practice of crop rotation uses nitrogen fixation to create fertile fields. First, a plant without a nitrogen-fixing relationship, such as corn, is planted. After the harvest, a nitrogen-fixing plant replaces the initial crop. Instead of harvesting the nitrogen-fixing plant, however, it is plowed under. The cycle continues in this manner. Which of the following is not an abiotic factor that affects plants being used in crop rotation? a) NH3 availability b) Soil temperature c) Herbivore density d) Oxygen concentrationarrow_forwardIf only one half of the flora in the world existed in 2110 (perhaps due to deforestation), what do you predict the atmospheric carbon level would be ? How would you change the simulation to reflect this? What is the relationship between increased carbon in the ocean and increased carbon in the soil? How else might carbon be transferred to soil? Using the data generated by the simulation, determine the mathematical relationship between the percentage increase in fossil fuel consumption and the increase in atmospheric carbon. Is the relationship linear?arrow_forward
- In another experiment, fishes were placed in separate aquarium tanks with water coming from three different waterways in Los Baños. Three tanks were filled with water from each source and equal number of fish were placed in each tank. The tanks were refilled as required with water from the original sources. Two plant species known to be bioremediators were tested and compared with a control (no plants). Three tanks were assigned to each of the plant species and the control. After three months, a sample of fish was taken from each tank and evaluated whether the fish contains heavy metals above the threshhold(1) and 0, otherwise. Which is the most appropriate procedure to compare the plant species and the control? A. F-test B. t-test C. Cochran’s Q D. Friedman testarrow_forwardDoes soil survey compose all the valuable data needed for the study in resource conservation?arrow_forwardwhat is mutualism? mention any two example where the organisms involved are commercially exploited in modern agriculture.arrow_forward
- Identify the five ways that poor agriculture practices degrade our soils. Give typing answer with explanation and conclusionarrow_forwardTrace the route of the nutrients PO43- carried by river runoff to a seagrass ecosystem. Indicate the specific process involved (e.g., nitrification, denitrification, etc.) and the chemical form at each step of transformation. You may use the illustration below or you can draw your own. Use arrows to show the routearrow_forwardTrace the route of the nutrients NO 3- carried by river runoff to a seagrass ecosystem. Indicate the specific process involved (e.g., nitrification, denitrification, etc.) and the chemical form (e.g., NH +, NO -, etc) at each step of transformation. Write your (short) answers in the numbered blanks below each illustration.arrow_forward
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