3.3: Lab Report
Exercise A: How Penicillin Was Discovered
A.1. Identify the problem.
A.2. What was Fleming's hypothesis?
A.3. How was the hypothesis tested?
A.4. Do the results indicate that the hypothesis should be rejected?
A.5. This experiment led to the development of what major medical advancement?
Exercise B: Identify the Controls and Variables
B.1.1 Identify the control group.
B.1.2 Identify the independent variable.
B.1.3 Identify the dependent variable.
B.1.4 What should Muhammad's conclusion be?
B.1.5 How could this experiment be improved?
B.2.1 What was the initial observation?
B.2.2 Identify the control group, independent variable and dependent variable.
B.2.3 What can be concluded from Sophia's experiment?
B.3.1 Identify the Control Group, Independent Variable, and Dependent Variable.
B.3.2 Explain whether the data supports the advertisements claims about the new product.
B.3.3 How could this experiment be improved?
B.4.1 Design Lisa's experiment.
The Introduction, Exercise A, and Exercise B are adapted from the following:
Burran, Susan and DesRochers, David, "Principles of Biology I Lab Manual" (2015). Biological Sciences Open Textbooks. https://oer.galileo.usg.edu/biology-textbooks/3
Part of the Biology Commons. Follow this and additional works at: https://oer.galileo.usg.edu/biology-textbooks
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Exercise C: Reporting Scientific Work
C.1 What is a primary reference?
C.2 Name two peer-reviewed scientific journals in the field of Biology.
C.3 Use the internet to find a peer-reviewed journal article related to cell and molecular biology. Then, in your own words, write a summary of the research (1-2 paragraphs). Include the full reference citation.
Exercise D: Designing an Experiment
D.1 Create a testable hypothesis.
D.2 Create a prediction ( if your hypothesis is true, then what results do you expect?).
Data collection: Each student will measure their pulse rate ten times and calculate the average. Be sure to be seated and calm for at least ten minutes prior to taking your pulse. Record your data in the table below and share your average with the class.
D.3 What are the controlled variables in our experiment?
D.4 What is the control group?
D.5 What is the level of treatment?
| Measurement | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
|---|---|---|---|---|---|---|---|---|---|---|
| Beats per 15 seconds | ||||||||||
| Beats per minute |
Table 1. Individual Resting Pulse Rates
D.6 What is your average resting pulse rate in beats per minute (bpm)? _________ Place your average resting pulse rate onto the white board, make sure you correctly assign yourself as an athlete or non-athlete.
D.7 How many students are in the class? _______ How many students are athletic? ______ How many students are not athletic? ________
D.8 Copy the class information into the table below and calculate the class averages.
|
Athletic |
Nonathletic |
|
|---|---|---|
|
List of individual pulse rate averages (bpm) |
||
|
Class average (bpm) |
Table 2. Summary of Class Data: Resting Pulse Rates of Athletic and Nonathletic Individuals
D. 9 What was the independent variable for our experiment? On which axis would you graph this?
D.10 What was the dependent variable for our experiment? On which axis would you graph this?
D.11 Design a graph that shows the relationship between the dependent and independent variables in the experiment. Should you use a line graph or a bar graph? Remember to give the graph a proper title, label your x-axis and y-axis, and include their units. Use a separate sheet of paper and staple it to this lab.
D.12 Drawing conclusions: Does the data support your hypothesis?