Campbell Biology
12th Edition
ISBN: 9780135188743
Author: Urry
Publisher: PEARSON
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Chapter 37, Problem 8TYU
Summary Introduction
Introduction: Humus is a well decomposed organic material in soil. Humus contain many important nutrients such as nitrogen, phosphorous, magnesium, iron etc.
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You are characterizing a newly discovered organism . You have noticed that the organism grows on two carbon sources - sucrose and mannitol . Whenever you add both sugars to the medium , sucrose will be completely metabolized before mannitol .
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Chapter 37 Solutions
Campbell Biology
Ch. 37.1 - Explain how the phrase "too much of a good thing"...Ch. 37.1 - Some lawn mowers collect clippings. What is a...Ch. 37.1 - WHAT IF? How would adding clay to loamy soil...Ch. 37.1 - MAKE CONNECTIONS Note three ways the properties...Ch. 37.2 - Are some essential elements more important than...Ch. 37.2 - WHAT IF? If an element increases the growth rate...Ch. 37.2 - Prob. 3CCCh. 37.3 - Prob. 1CCCh. 37.3 - How do soil bacteria and mycorrhizae contribute to...Ch. 37.3 - MAKE CONNECTIONS What is a general term that is...
Ch. 37.3 - WHAT IF? A peanut farmer finds that the older...Ch. 37 - How is soil a complex ecosystem?Ch. 37 - Do plants need soil to grow? Explain.Ch. 37 - Prob. 37.3CRCh. 37 - Level 1: Knowledge/Comprehension 1. The inorganic...Ch. 37 - Micronutrients are needed in very small amounts...Ch. 37 - Prob. 3TYUCh. 37 - Prob. 4TYUCh. 37 - Prob. 5TYUCh. 37 - A mineral deficiency is likely to affect older...Ch. 37 - The greatest difference in health between two...Ch. 37 - Prob. 8TYUCh. 37 - Prob. 9TYUCh. 37 - Prob. 10TYUCh. 37 - Prob. 11TYUCh. 37 - SCIENTIFIC INQUIRY Acid precipitation has an...Ch. 37 - SCIENCE, TECHNOLOGY, AND SOCIETY In many...Ch. 37 - Prob. 14TYUCh. 37 - Prob. 15TYU
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- You are employed by a research institution that develops technology for food preservation. The head of the department wants you to develop a controlled fermentation procedure that utilizes carabao mango. The required flavour are as follows: tart and buttery taste. What LAB species will you utilize in the fermentation process? What method will you use in the starter culture preparation and addition? What are the essential ingredients and condition that will favour the growth of your starter culture?arrow_forwardHow would green manure and soil microorganisms work together in enhancing soil fertility and crop yield? Name the targeted element and TWO (2) additional benefits brought by green manures to the soil?arrow_forwardIf yellow xanthophylls were present in the extract, why did the extract appear green?arrow_forward
- You count 54 colonies of bacteria on an agarp late on which you spread 0.2ml of a 10^-4 (or 1/10,000) dilution of soil. Claculate how many colony forming units of bacteria are present. (A) 2700000 (B) 0.0027 (C) 2.6 * 10^-6 (D) 108,000arrow_forwardA soil sample is placed in liquid and the number of bacteria in the sample determined in two ways: (1) colony count and (2) direct microscopic count. How would the results compare?a) Methods 1 and 2 would give approximately the same results.b) Many more bacteria would be estimated by method 1.c) Many more bacteria would be estimated by method 2.d) Depending on the soil sample, sometimes method 1 would be higher and sometimes method 2 would be higher.arrow_forwardc) Pasteurization is a technique that uses temperatures of about 72°C to neutralize potential pathogens in foods. a. Justify the effect does this temperature have on the enzymes and cellular metabolism of pathogens. b. Argue why does the heat of pasteurization kill some microorganisms yet fail to affect thermophiles?arrow_forward
- Please answer the following correctly: m) Tannins are produced by many woody plants and have antimicrobial properties that can interfere with fermentation in the production of biofuels. Are tannin extracts effective in inhibiting yeast fermentation?arrow_forward1(a) 1. What is the theory upon which intermittent sterilization is based? (B) Is dry or moist heat more efficient as a sterilizing agent? Why? (C) When would it be necessary to use aseptic techniques when inoculating a tube of nutrient broth with dirt? (D)Why do some microorganisms characteristically form a growth of the pellicle type? What environmental factors might alter the formation of a pellicle? (This is not a graded assignment)arrow_forwardYou are now working in the Research and Development Department of a start-up company that manufactures juices from local berries. Next in the pipeline is the production of calumpit juice, which is targeted for export to various countries. Alicyclobacillus acidoterrestris, a spoilage organism of concern in berry juices, has a D95oC = 1.0 minute in the new product. A.) If you inoculated 3.5x 104 cells to the juice, how long would it take to effect a 3-log reduction of the organism at 95oC? B.) How many cells will remain after four minutes of heating at the same temperature? C.) You found out that Geobacillus stearothermiphilus, another spore forming bacterium, can also spoil the calumpit juice. Thermal inactivation studies revealed a D95oC = 2.0 for G. stearothermophilus in the product. Which of the two spoilage bacteria is more heat resistant? Which one will you take into consideration when you compute for the F value. Defend your answer.arrow_forward
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