1.Reasons for conducting peer review include all of the following except
A)
analyzing the experimental design
B)
pointing out possible bias
C)
identifying an illogical conclusion
D)
changing data to support the hypothesis
2.
In 1910, Thomas Morgan discovered a certain pattern of inheritance in fruit flies known as sex linkage. This discovery extended the ideas of inheritance that Gregor Mendel had discovered while working with garden peas in 1865. Which principle of scientific inquiry does this illustrate?
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A.
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the control group must be part of a valid experiment.
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B.
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The same experiment must be repeated many times to
validate
the results.
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C.
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Values can be used to make ethical decisions about scientific discovery.
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Part 3 YOU DO: Regents Based Questions- Answer the following questions related to the passage.
Base your answer to the following question on the information below and on your knowledge of biology.
You are in charge of the research department of the Spinach is Green Company. Your company is experimenting with growing spinach using hydroponic technology. Hydroponic technology involves growing plants in containers of growth solution in a greenhouse. No soil is used. The growth solution that the company uses contains water, nitrogen, and phosphorus. The company wants to know if adding protein to this formula will improve spinach growth.
Briefly describe how to test the effect of the formula with protein added. In your description, be sure to:
- state a hypothesis to be tested in the new experiment
-state how the control group will be treated differently from the experimental group
- identify two factors that must be kept the same in both the experimental and control groups
- identify the IV
- identity the DV
-state whether the data collected supports or refute the hypothesis
-state one way the researchers can make this experiment more valid
2.A laboratory investigation was set up to determine if the hormone thyroxin increases metabolic activity in rats. Twenty rats of the same species, age, and weight were selected and divided into two equal groups. All the factors in the investigation were kept the same, except one group was given distilled water, and the other group was given distilled water containing thyroxin. The scientists noted at the end of the experiment the rats who had been given distilled water with thyroxin had an increased metabolic activity rate of 30%, while the rats who had been given distilled water had 0% increase in metabolic activity.
State the hypothesis in this experiment.
- State how the control group will be treated differently than the experimental group.
- State whether or not the results support or refute the data.
- State two factors that must be kept the same in experiment.
- State whether the results support or refute the hypothesis.
- State one way this experiment can increase in validity.