You are at a stage in your research in which you must design an experiment to test your hypothesis. Which factors
must you include to ensure that you obtain valid data?
What will be an ideal response?
ANSWER: Any experimental design must include a control group, an experimental group or variable,
and must include replicates to validate data.
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During stressful times, the adrenal glands increase their secretion of _____
a. iodine c. cortisol b. antidiuretic hormone d. secretin
You have digested a molecule of DNA and want to identify a specific fragment of interest. The DNA is subjected to gel electrophoresis, but you get two bands that are very close in size. What could you use to determine which band is the correct one?
What will be an ideal response?
Nitric oxide and epinephrine _____
A) both function as neurotransmitters B) both function as steroid hormones C) bind the same receptors D) both cause a reduction in the blood levels of glucose
The "window period" for HIV is the time when the person is mostly likely to test positive for HIV antibodies.
a. true b. false