BIOLOGY
4th Edition
ISBN: 9781266739606
Author: Hoefnagels
Publisher: MCG
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Textbook Question
Chapter 1, Problem 7MCQ
In an experiment to test the effect of temperature on the rate of bacterial reproduction, temperature would be the
a. standardized variable.
b. independent variable.
c. dependent variable.
d. control variable.
Expert Solution & Answer
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Check out a sample textbook solutionStudents have asked these similar questions
A. From the experiment, what are the approximate optimal temperatures of organisms A-D? Please report temperature ranges wherever applicable. Classify these organisms based on their temperature requirements.
B. While doing this experiment, your friend dropped a tube of organism B on herself by accident. Although the spill was cleaned, she is worried about catching an infection. What would your advice to her be based on the data that you have generated in the experiment?C. Three out of four organisms did not grown on the plates incubated at 680C. What is the likely molecular explanation for this? Hint: What cellular structures are affected at this temperature?
For an estimation of microbial population
experiment, you obtained the following
results:
A. 1000X dilution with 0.1 mL sample
volume - 470 colonies
B. 10000X dilution with 0.1 mL sample
volume - 250 colonies
C. 100000X dilution with 0.1 mL sample
volume - 100 colonies
D. 1000000X dilution with 0.1 mL sample
volume 12 colonies
For each set of results, determine if the
samples are countable plates, and for only
the countable plates, calculate the
CFU/mL for those plates. For plates that
are not countable, please state that and
do not perform the calculation (please
note that calculating the CFU/mL for a
plate that is not countable will be marked
as incorrect).
A bacterial culture is initially composed of 100 cells. After 1 hour the number of bacteria is 1.5 times the initial population.
a. If the rate of growth is proportional to the number of bacteria present, determine the time necessary for the number of
bacteria to triple.
b. What is the time required for a culture with 1x106 of the same bacteria to triple? Explain your results.
c. Under what conditions would the answers obtained in (b) be invalid?
Chapter 1 Solutions
BIOLOGY
Ch. 1.1 - Does any nonliving object possess all of the...Ch. 1.1 - Prob. 2MCCh. 1.1 - The bacteria in figure 1.8 reproduce asexually,...Ch. 1.2 - What are the goals of taxonomy?Ch. 1.2 - How are domains related to kingdoms?Ch. 1.2 - List and describe the four main groups of...Ch. 1.3 - Identify the elements of the experiment summarized...Ch. 1.3 - Prob. 2MCCh. 1.3 - What is the difference between a hypothesis and a...Ch. 1.3 - Prob. 4MC
Ch. 1.3 - Compare and contrast science and technology.Ch. 1.4 - Prob. 1MCCh. 1.4 - How does this story illustrate discovery science?Ch. 1 - Which of the following is smaller than an...Ch. 1 - All of the following are characteristics of life...Ch. 1 - The concentration of salts in blood remains...Ch. 1 - Because plants extract nutrients from soil and use...Ch. 1 - Evolution through natural selection will occur...Ch. 1 - Homo sapiens is the scientific name for humans. It...Ch. 1 - In an experiment to test the effect of temperature...Ch. 1 - A scientist has just observed a new phenomenon and...Ch. 1 - Prob. 9MCQCh. 1 - Which of the following statements is false? a....Ch. 1 - Describe each of the five characteristics of life,...Ch. 1 - Imagine two related species of single-celled...Ch. 1 - Prob. 3WIOCh. 1 - Think of an analogy that will help you remember...Ch. 1 - Other than the examples given in the text name an...Ch. 1 - Draw and explain the relationship between...Ch. 1 - Prob. 7WIOCh. 1 - Prob. 8WIOCh. 1 - How are the members of the three domains similar?...Ch. 1 - List each step of the scientific method and...Ch. 1 - Give two examples of questions that you cannot...Ch. 1 - Design an experiment to test the following...Ch. 1 - Prob. 1PITCh. 1 - Prob. 2PITCh. 1 - Prob. 3PIT
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