Campbell Essential Biology with Physiology (6th Edition)
6th Edition
ISBN: 9780134711751
Author: Eric J. Simon, Jean L. Dickey, Jane B. Reece
Publisher: PEARSON
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Chapter 4, Problem 15PS
Interpreting Data A population of bacteria may evolve resistance to a drug over time. Draw a graph that represents such a change. Label the x-axis as “time” and the y-axis as “population size.” Draw a line on the graph that represents how the
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Fill in the Blank. Round it to the nearest whole number.
A mutation occurs in a single bacterium that causes it to produce a new enzyme. This enzyme helps the bacterium process nutrients more efficiently, increasing the bacterium's odds of survival.
Every 30 minutes, the bacteria in the colony divide, passing their genes on to their offspring. Some bacteria survive, while others do not. Because resources are limited, the colony has a steady population of 114 bacteria.
The bacterial colony is shown below at three different time intervals.
The picture would be here:
Assume that the survival trend shown in the diagram continues. At 3.0 hours, the mutant bacteria will make up _____ percent of the entire colony.
How does natural selection explain the development of antibiotic resistant bacteria? See this video for help. http://ed.ted.com/lessons/how-antibiotics-become-resistant-over-time-kevin-wu
Use the table to answer the question.
In 1928, Frederick Griffith injected four groups of mice with different strains of the bacteria, Streptococcus pneumoniae. The smooth strain had a polysaccharide capsule that protected the bacteria from the mouse’s immune system. The rough strain did not have this capsule. The details of each group and the results of the experiment are shown in the table below.
Bacteria
After injection with bacteria
Group 1
smooth strain
mice died
Group 2
rough strain
mice survived
Group 3
heat-killed smooth strain
mice survived
Group 4
rough strain mixed with heat-killed smooth strain
mice died
Which conclusion about Group 4 is MOST strongly supported by the results of the experiment?
A.
A virus carried DNA from the smooth strain to the rough strain.
B.
The rough strain took in DNA from the heat-killed smooth strain.
C.
The rough strain developed a genetic mutation during binary fission.
D.
The smooth strain…
Chapter 4 Solutions
Campbell Essential Biology with Physiology (6th Edition)
Ch. 4 - You look into a microscope and view an unknown...Ch. 4 - Explain how each word in the term fluid mosaic...Ch. 4 - Identify which of the following structures...Ch. 4 - Prob. 4SQCh. 4 - Prob. 5SQCh. 4 - Name two similarities in the structure or function...Ch. 4 - Prob. 7SQCh. 4 - Prob. 8SQCh. 4 - Prob. 9SQCh. 4 - Prob. 10IMT
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