Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
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.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
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) 108,000
c) 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?
A 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.
Chapter 37 Solutions
Campbell Biology (10th Edition)
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
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 1(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_forwardprior to this study, why did researchers never notice that B. anthracis can make both an S-layer and a capsule simultaneously? I need help finding the answer in the article and explan in the shortest way please i linked the url for the full article https://www.ncbi.nlm.nih.gov/pmc/articles/PMC106848/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
- Mention and explain at least one reason why you might obtain growth of bacteria on EMB that was supposed to appear green but it resulted in pink color?arrow_forwardB) A total of 2.5 x 105 cells were harvested from the patient. You need the cells to fill a scaffold with dimensions of 20mm x 20mm x 4mm at a final density of 2 x 104 cells/mm³. After culturing the harvested cells, you found that they have a doubling time of 36 hours. Determine the total number of cells (N) needed to fill the scaffold. Show your work.arrow_forwardYou inoculate two test tubes with the same amount of identical growth medium and with the same number of identical yeast cells and grow these cells under identical conditions except for the presence or absence of oxygen. a) After 12 hours, all of the glucose in each culture has been consumed. You determine the number of total cells found in each culture and find that one culture has more cells than the other. Which culture would have the greater cell density, the one grown aerobically or the one grown anaerobically? Explain why the culture you chose above can make more cells with the same amount of glucose than the other culture.arrow_forward
- Maargerines made from plant oils are healthier, since they are hydrogenated for spreadability? A)True B)falsearrow_forwardIn a population of cyanobacteria (Chlorogloeopsis fritschii) in a hot spring in Iceland, some of the bacteria can produce chlorophyll f, while some C. fritschii produce only other types of chlorophylls. Chlorophyll f absorbs light outside of the visible light spectrum, namely near infrared light, allowing the bacteria to absorb light that has not been absorbed or reflected by the water or other organisms. The ability to produce chlorophyll f is heritable, and the bacteria with chlorophyll f can live in low-light environments, such as underneath other organisms, or near the bottom of the light-penetrating zone of the spring. What is the adaptation in this population of C. fritschii living in low-light environments? (Choose one.) a) the ability to produce chlorophyll f b) the ability to produce any type of chlorophyll c) the ability to tolerate the high temperatures of the hot spring d) the ability to survive and reproducearrow_forwardIn this exercise, what will be the outcome if B. megaterium was grown in a rich medium? Explain.arrow_forward
- The image here shows the growth rate for Chlamydomonas as a function of temperature. Which of the following reasons could explain why Chlamydomonas can't grow at 40°C? 10 15 20 25 30 35 40 Growth Temperature (*C) A. The rate of molecular motion is too high at 40°C to sustain life. B. The turnover time of rubisco is too fast. O C. The glycolysis enzyme hexokinase loses its tertiary structure. D. The desaturase enzyme DesA, is not expressed. Reset Selection Growth Rate (divisions/day)arrow_forwardWhat process would explain why the dyes spread through the agar?arrow_forwardSwitchgrass is used for ethanol production. The composition of the switchgrass is 37% cellulose, 24% xylan, 3% galactan, 4% arabinan, 20% lignin, 7% extractives, and 5% ash. A dilute acid pretreatment method is applied to the switchgrass before enzymatic hydrolysis and fermentation. The pretreatment hydrolyzes 10% hexosan and 90% pentosan into monomeric sugars. Approximately 30% of the hydrolyzed pentoses further react & are decomposed to furfural. Assume that there is no decomposition of the hydrolyzed hexoses. Further Assume that lignin, extractives, and ash do not change during the pretreatment. • How much of each lignocellulosic sugar (glucose, xylose, galactose, and arabinose) is produced when pretreating 1,000 kg (dry matter) switchgrass? How much furfural is formed? • Is water consumed or produced in these pretreatment hydrolysis and dehydration reactions? How much in each?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Human Anatomy & Physiology (11th Edition)BiologyISBN:9780134580999Author:Elaine N. Marieb, Katja N. HoehnPublisher:PEARSONBiology 2eBiologyISBN:9781947172517Author:Matthew Douglas, Jung Choi, Mary Ann ClarkPublisher:OpenStaxAnatomy & PhysiologyBiologyISBN:9781259398629Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa StouterPublisher:Mcgraw Hill Education,
- Molecular Biology of the Cell (Sixth Edition)BiologyISBN:9780815344322Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter WalterPublisher:W. W. Norton & CompanyLaboratory Manual For Human Anatomy & PhysiologyBiologyISBN:9781260159363Author:Martin, Terry R., Prentice-craver, CynthiaPublisher:McGraw-Hill Publishing Co.Inquiry Into Life (16th Edition)BiologyISBN:9781260231700Author:Sylvia S. Mader, Michael WindelspechtPublisher:McGraw Hill Education
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education
Industrial Processes and By-products | 9-1 GCSE Chemistry | OCR, AQA, Edexcel; Author: SnapRevise;https://www.youtube.com/watch?v=CMLKgqEMXwc;License: Standard Youtube License