Pre-Lab Questions What is a model organism, and why is Saccharomyces cerevisiae so often used as one? Research and discuss the properties of mold that make them sometimes beneficial to humans, and sometimes potentially harmful. Parasitic helminths are a major cause of disease in undeveloped countries around the world. Discuss the role that microbiologists can and have played in helping to reduce the number of infections caused by parasitic helminths as well as diagnoses and treatments. Experiment 1: Mold Growth on Bread and Fruit Data Tables Table 1: Experiment 1 Growth Results Condition Day of First Visible Growth Extent of Growth on Bread (Mean) Extent of Growth on Apple (Mean) Bright, Control Bright, Water Bright, Sugar Bright, Lemon Bright, Vinegar Dark, Control Dark, Water Dark, Sugar Dark, Lemon Dark, Vinegar Post-Lab Questions Which condition produced the most mold growth? The least? The fastest? The slowest? What was the purpose of examining three pieces of bread and three pieces of apple in each treatment? Based on your results, what conditions are most favorable for mold growth on bread? On apple? Would these conditions apply to all fungal growth? Did you notice a difference in mold growth on the bread vs the apple? If so, what do you think might account for this difference? How would changing the type of bread (e.g. fresh from a bakery, no preservatives vs. prepackaged with preservatives) affect the results? How do you think changing the temperature at which the bags were incubated affected the results? How would you test the predictions/hypotheses from Questions 6 and 7? Look up the pH of lemon juice and vinegar. Based on your results and your knowledge of favorable environmental conditions for fungal growth, what can you conclude about the effect of pH on growth? What is the source of the mold that grew on the samples?

Pre-Lab Questions What is a model organism, and why is Saccharomyces cerevisiae so often used as one? Research and discuss the properties of mold that make them sometimes beneficial to humans, and sometimes potentially harmful. Parasitic helminths are a major cause of disease in undeveloped countries around the world. Discuss the role that microbiologists can and have played in helping to reduce the number of infections caused by parasitic helminths as well as diagnoses and treatments. Experiment 1: Mold Growth on Bread and Fruit Data Tables Table 1: Experiment 1 Growth Results Condition Day of First Visible Growth Extent of Growth on Bread (Mean) Extent of Growth on Apple (Mean) Bright, Control Bright, Water Bright, Sugar Bright, Lemon Bright, Vinegar Dark, Control Dark, Water Dark, Sugar Dark, Lemon Dark, Vinegar Post-Lab Questions Which condition produced the most mold growth? The least? The fastest? The slowest? What was the purpose of examining three pieces of bread and three pieces of apple in each treatment? Based on your results, what conditions are most favorable for mold growth on bread? On apple? Would these conditions apply to all fungal growth? Did you notice a difference in mold growth on the bread vs the apple? If so, what do you think might account for this difference? How would changing the type of bread (e.g. fresh from a bakery, no preservatives vs. prepackaged with preservatives) affect the results? How do you think changing the temperature at which the bags were incubated affected the results? How would you test the predictions/hypotheses from Questions 6 and 7? Look up the pH of lemon juice and vinegar. Based on your results and your knowledge of favorable environmental conditions for fungal growth, what can you conclude about the effect of pH on growth? What is the source of the mold that grew on the samples?

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Pre-Lab Questions

What is a model organism, and why is Saccharomyces cerevisiae so often used as one?
Research and discuss the properties of mold that make them sometimes beneficial to humans, and sometimes potentially harmful.
Parasitic helminths are a major cause of disease in undeveloped countries around the world. Discuss the role that microbiologists can and have played in helping to reduce the number of infections caused by parasitic helminths as well as diagnoses and treatments.

Experiment 1: Mold Growth on Bread and Fruit

Data Tables

Table 1: Experiment 1 Growth Results

Condition	Day of First Visible Growth	Extent of Growth on Bread (Mean)	Extent of Growth on Apple (Mean)
Bright, Control
Bright, Water
Bright, Sugar
Bright, Lemon
Bright, Vinegar
Dark, Control
Dark, Water
Dark, Sugar
Dark, Lemon
Dark, Vinegar

Post-Lab Questions

Which condition produced the most mold growth? The least? The fastest? The slowest?
What was the purpose of examining three pieces of bread and three pieces of apple in each treatment?
Based on your results, what conditions are most favorable for mold growth on bread? On apple?
Would these conditions apply to all fungal growth?
Did you notice a difference in mold growth on the bread vs the apple? If so, what do you think might account for this difference?
How would changing the type of bread (e.g. fresh from a bakery, no preservatives vs. prepackaged with preservatives) affect the results?
How do you think changing the temperature at which the bags were incubated affected the results?
How would you test the predictions/hypotheses from Questions 6 and 7?
Look up the pH of lemon juice and vinegar. Based on your results and your knowledge of favorable environmental conditions for fungal growth, what can you conclude about the effect of pH on growth?
What is the source of the mold that grew on the samples?

Definition Definition Organism that lives in the body of another organism and obtains food at the expense of the host. A parasite can directly or indirect harm the host. There are two kinds of parasites: internal and external. An internal parasite lives inside another organism and is known as an endoparasite. An external parasite lives on the body surface of the host and is known as an ectoparasite. Protozoa and helminths are examples of major human parasites.

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