Biology: Science for Life with Physiology (5th Edition)
5th Edition
ISBN: 9780321922212
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Textbook Question
Chapter 14, Problem 5LTB
According to the graph shown here, the
Time
- 0 flies;
- 100 flies;
- 150 flies;
- between 100 and 150 flies;
- impossible to determine
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Below is the colony diameter for each yeast culture grown on PDA and AcA incubated at 35°C measured at Day 7. From the data presented above, what could you observe about the growth of the yeast cultures on PDA and AcA? Cite possible reasons behind this.
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See the follow up procedure for determining colony counts and express the number of colony forming units
(CFU) in scientific notation. Record "TNTC" for plates with colonies that are too numerous to count.
CFU/mL-Use scientific notation
DILUTION
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Chapter 14 Solutions
Biology: Science for Life with Physiology (5th Edition)
Ch. 14 - Prob. 1LTBCh. 14 - Prob. 2LTBCh. 14 - Prob. 3LTBCh. 14 - Prob. 4LTBCh. 14 - According to the graph shown here, the carrying...Ch. 14 - All of the following are density-dependent factors...Ch. 14 - In contrast to nonhuman populations, human...Ch. 14 - Populations that rely on stored resources are...Ch. 14 - The current carrying capacity of Earth for the...Ch. 14 - Prob. 10LTB
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- Your labmate tells you that you need to go back to the original colony each time you streak a new quadrant on your streak plate to achieve the goal of the lab. Is your labmate correct (does this achieve the goal)? Why or why not? (2-3 sentences max)arrow_forwardplates normally show a 10-fold decrease in colony number through the dilutions, e.g. 500 on Plate D, ~50 on E, ~5 on F, and maybe none on G. If this was not observed, what human errors might have contributed to inconsistent serial dilution? How could one ensure proper serial dilution technique for future labs?arrow_forwardlabel the pellicle and daughter paramecia of paramecium PLEASE DRAW ON THE PICTURE, USE ARROW AND DRAWarrow_forward
- A medium was inoculated with 5 * 106 cells/ml of Escherichiacoli cells. Following a 1-h lag, the population grewexponentially for 5 h, after which the population was 5.4 * 109cells/ml. Calculate g and k for this growth experiment.arrow_forward+ Slider1 + Slider2 108 107 106 105 104 30 60 90 120 150 180 210 240 Time in minutes Determine the following: 1. The shortest generation time (shortest cell doubling time, in mins) of the organism 2. The growth rate of the organism at the point where its generation time is shortest 3. Describe the organism's growth curve using the numerical data you obtained from your calculations of generation time and growth rate. Cell numbersarrow_forwardDescribe fully the colonial morphology of the colonies shown in the image. A full description will include texture, transparency, color, and form (size, overall shape, margin, and elevation).arrow_forward
- this question about the bacteria growth R=replicatearrow_forwardAs shown in this diagram, you perform a ten-fold serial dilution of a culture to determine the number of colony forming units (CFU) per mL it contains. You do a plate count with these growth results (no. of colonies for each dilution): 1:10 too many to count; 1:100 too many to count; 1:1,000 174; 1:10,000 23; 1:100,000 no growth. The number of CFU per mL in the original culture was: 1 ml 1 ml Original inoculum Dilutions 9 ml broth in each tube 1:10 1 ml 174,000 1:100 1 ml 1 ml 1 ml 1:1000 1 ml 1:10,000 1 ml None of the other four answers (Correct answer not given) 1,000 230,000 174 1 ml 1:100,000 1 mlarrow_forwardAs shown in this diagram, you perform a ten-fold serial dilution of a culture to determine the number of colony forming units (CFU) per mL it contains. You do a plate count with these growth results (no. of colonies for each dilution): 1:10 too many to count; 1:100 too many to count; 1:1,000 312; 1:10,000 38; 1:100,000 no growth. The number of CFU per mL in the original culture was: A. 38 B. 380,000 C. 38,000 D. None of the other four answers (Correct answer not given) E. 10,000arrow_forward
- Sexual spore production by Penicillium is by a zygosporangium True Falsearrow_forwardYou are growing a culture of S. aureus. You know that 9 generations have occurred after 6 hours. What is the generation time in minutes? if i started a culture with 1000 cells, after 8 generations, how many cells will i have?arrow_forwardLabel of these two images.arrow_forward
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