Prentice Hall Biology (California)
Prentice Hall Biology (California)
1st Edition
Kenneth R. Miller, Levine
ISBN: 9780132013529
Textbook solutions

All Solutions

Page 33: Standards Practice

Exercise 1
Step 1
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The manipulated variable is the variable that is changed in the experiment. In this case, the manipulated variable was the size of containers. Population A was kept in a half liter container, whereas population B was kept in a 1 liter container. Other variables such as the number of groups studied and the time were all the same.
Result
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E. size of the containers
Exercise 2
Solution 1
Solution 2
Step 1
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Based on the diagram the growth rate increased with more space.
Result
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B
Step 1
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The given controlled experiment involved two groups of fruit flies – Groups A and B. Group A was kept in a 0.5-L container, while Group B is kept in a 1.0-L container. As we can see, the size of the container is the manipulated variable that was changed.
Step 2
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Therefore, the researcher must draw a conclusion based on the effects of the manipulated variable (in this case, the size of the container) on the groups of fruit flies. Based on the results, we can conclude that a larger container allows for more growth of fruit flies.
Result
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B
Exercise 3
Step 1
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Asexual reproduction occurs when a parent cell produces another copy of itself.
Result
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D. one parent
Exercise 4
Step 1
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Based on the metric system, 1 meter is equivalent to 1000 millimeters.
Result
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A. 1000 millimeters
Exercise 5
Step 1
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According to the table, the puppy’s mass at 2 months is 5 kilograms. After a month, the mass increased to 8 kilograms. This means that the puppy gained 3 extra kilos when it was fed with a special puppy food.
Result
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D. The puppy added more mass during month 3 than during month 2
Exercise 6
Step 1
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This test is not a controlled experiment since there is no manipulated variable. This is simply a quantitative observation that is recorded using a table.
Result
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E. The owner conducted a controlled experiment.
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