In the following data table of an experiment carried out at 4°C (39.2 F) over 4 hours
|
Solution in bag |
Solution outside bag |
Bag mass change (g): |
|
water |
Water |
-0.2 |
|
20% sucrose |
Water |
+2.4 |
|
, 40% sucrose |
Water |
+4.3 |
|
, 60% sucrose |
water |
+5.8 |
Which of the following options represents the dependent variable?
Duration
Temperature
Bag mass change
Sucrose concentrations.
The Correct Answer is C
In an experiment, the dependent variable is the variable that is being measured and is expected to change in response to changes in the independent variable(s).
In this case, the bag mass change is being measured and is expected to change in response to changes in the independent variable (sucrose concentration).
Choice A is incorrect because duration is not a variable in this experiment.
Choice B is incorrect because temperature is not a variable in this experiment.
Choice D is incorrect because sucrose concentration is an independent variable, not a dependent variable.
An independent variable is a variable that is manipulated by the experimenter to see how it affects the dependent variable.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
The hypothalamus is a region of the brain that synthesizes antidiuretic hormone (ADH), also known as vasopressin.
ADH is then transported to the posterior pituitary gland via neurohypophysial capillaries, where it is stored until it is ready to be secreted into the circulation.
Choice A. Pineal gland is not correct because it is a small endocrine gland located in the brain that secretes the hormone melatonin, which regulates sleep-wake cycles, but it does not synthesize ADH.
Choice B. Thymus is not correct because it is a gland located in the chest that produces hormones involved in immune system development, but it does not synthesize ADH.
Choice D. Pancreas is not correct because it is a gland located behind the stomach that secretes hormones such as insulin and glucagon, which regulate blood sugar levels, but it does not synthesize ADH.
Correct Answer is C
Explanation
It can also be caused by an underwater or coastal landslide, the eruption of a volcano, or the impact of a meteor or comet in a body of water.
Choice A is not correct because sunspot activity does not cause tsunamis.
Choice B is not correct because lightning strikes do not cause tsunamis. Choice D is not correct because flooding does not cause tsunamis.
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