MASTERING BIOLOGY CHAPTER 1 PRE
LECTURE ASSIGNMENT WITH QUESTIONS
AND ANSWERS.
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 yield useful results regardless of whether the hypothesis is
supported or rejected.
c. They must be well documented. - CorreCt Answers -a. 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 enable investigators to repeat the test
b. To create a control group
c. To eliminate alternative explanations for the results of an experiment -
CorreCt Answers -c. 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. College students think football is more fun to watch than baseball.
c. Grass is green because it contains chlorophyll. - CorreCt Answers -a. 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 proved.
b. A hypothesis can be supported or rejected through experimentation. -
CorreCt Answers -b. A hypothesis can be supported or rejected through
experimentation.
Which of the following variables did Pasteur change in his experiment to
test the hypothesis of spontaneous generation?
a. The length of time that the broth was boiled
b. The broth used in each flask
c. The length of time that the flasks were allowed to sit before being
sampled for organisms
d. The shape of the flask - CorreCt Answers -d. The shape of the flask
In Pasteur's experiment to test the hypothesis of spontaneous generation,
why did he boil the broth in both flasks?
a. To kill any existing organisms in the broth
b. To expose the broth to a source of organisms
c. To attract dust particles to each flask
LECTURE ASSIGNMENT WITH QUESTIONS
AND ANSWERS.
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 yield useful results regardless of whether the hypothesis is
supported or rejected.
c. They must be well documented. - CorreCt Answers -a. 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 enable investigators to repeat the test
b. To create a control group
c. To eliminate alternative explanations for the results of an experiment -
CorreCt Answers -c. 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. College students think football is more fun to watch than baseball.
c. Grass is green because it contains chlorophyll. - CorreCt Answers -a. 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 proved.
b. A hypothesis can be supported or rejected through experimentation. -
CorreCt Answers -b. A hypothesis can be supported or rejected through
experimentation.
Which of the following variables did Pasteur change in his experiment to
test the hypothesis of spontaneous generation?
a. The length of time that the broth was boiled
b. The broth used in each flask
c. The length of time that the flasks were allowed to sit before being
sampled for organisms
d. The shape of the flask - CorreCt Answers -d. The shape of the flask
In Pasteur's experiment to test the hypothesis of spontaneous generation,
why did he boil the broth in both flasks?
a. To kill any existing organisms in the broth
b. To expose the broth to a source of organisms
c. To attract dust particles to each flask
