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Mastering Biology - Chapter 1 Key Concepts Questions and Answers
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Mastering Biology - Chapter 1 Key Concepts
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Mastering Biology - Chapter 1 KeyConcepts
Which of the following statements is *not* true of scientific experiments?
a) they must occur under carefully controlled conditions found in a laboratory
b) they must be well documented
c) they yield useful results regardless of whether the hypothesis is supported or rejected
- answera) they must occur under carefully controlled conditions found in a laboratory
In an experiment, investigators try to control all of the variables except one—the one
that tests the hypothesis. Which of the following reasons is the primary rationale for
controlling variables in an experiment?
a) to create a control group
b) to eliminate alternative explanations for the results of an experiment
c) to enable investigators to repeat the test - answerb) to eliminate alternative
explanations for the results of an experiment
Which of the following statements could not be supported or rejected by a scientific
experiment?
a) the first living cell on Earth came from outer space
b) grass is green because it contains chlorophyll
c) college students think football is more fun to watch than baseball - answera) the first
living cell on Earth came from outer space
Which of the following statements is true of a hypothesis?
a) a hypothesis can be supported or rejected through experimentation
b) a hypothesis can be proved - answera) a hypothesis can be supported or rejected
through
A linear relationship means that as one variable changes, the other variable changes at
a ______ rate, resulting in a straight line on a graph.
a) exponential
b) constant - answerb) constant
The slope is the ratio of the ______ of the line to the ______ of the line.
, a) run, rise
b) run, run
c) rise, run
d) rise, rise - answerc) rise, run
In y = mx+b, what does *b* stand for?
a) slope
b) variable
c) x-intercept
d) y-intercept - answerd) y-intercept
In y = mx+b, what does *m* stand for?
a) slope
b) variable
c) x-intercept
d) y-intercept - answera) slope
Which type of graph allows you to plot a discrete data point for each subject?
a) pie graph
b) bar graph
c) scatter plot
d) line graph - answerc) scatter plot
Which type of graph is used when continuous data is collected from one sample over a
period of time?
a) pie graph
b) bar graph
c) scatter plot
d) line graph - answerd) line graph
What does the regression line (aka trend line, best-fit line) represent?
a) it represents the straight line that the data should have followed
b) it represents the straight line that the data would never hit
c) it represents the straight line that runs through the most data points
d) it represents the straight line that fits most closely the trend in the data - answerd) it
represents the straight line that fits most closely the trend in the data
A statistical measure of how closely data fit a linear relationship is called...
a) correlation coefficient
b) diagnostic form
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