1 BIO 100 UNIT 1 PRACTICE TEST NOTE: Do not study from this test! For best results, study your textbook chapter, study guide, labs, and any other required coursework to the point at which you think that you are ready for the proctored exam in the learning center testing room. Then, take this test from beginning to end , without the help of your textbook, study guide, or any other resources. Once you are done with the test, check your answers. Finally, using your textbook, study guide, labs, etc. go back and review information that you missed or did not fully understand. If you follow our advice, you will have a better gauge of how well prepared you are for the proctored exam. Some students get a false sense of security for the real exam, because they “studied” from this test rather than treating it as a true practice test. Don’t bother trying to memorize the answers. The real exam will have different questions with different answers! You need to understand, not memorize. Answer the following questions on a separate sheet of paper . 1. The purpose of double-blind experiments is to: a. ensure that the hypothesis being tested is logical. b. guarantee that the experimental group will respond differently than the control group. c. help the subjects in an experiment understand the treatment they are receiving. d. minimize the effects of human bias on the results. 2. Consider an experiment in which subjects are given a pill to test its effectiveness on reducing the duration of a cold. Which of the following is the best way to treat the control group? a. Do nothing with the control group. b. Give the control group two pills instead of one. c. Give the control group a pill that does not affect the duration of colds. d. Let the control group choose whether or not to take any pills. 3. A scientific hypothesis has all the following features EXCEPT that: a. it is able to be proven true. b. it is falsifiable. c. it is a possible explanation for something. d. it is based on observations. 4. Suppose that a botanist is interested in the effect of light on plants. In an experiment she conducts, 50 individual plants of a single species of flowering plant are grown for 60 days under different lengths of artificial daylight in a greenhouse. The plant species has flowers that can be either white or pink, depending on the genetics of the parent plants. The amount of water and fertilizer provided to each plant is constant. At the end of the experiment, the size of each leaf of every plant is measured. The dependent variable in this experiment is the: a. duration of artificial daylight. b. flower's color. c. leaf's size. d. duration of the experiment.2 5. Mehran has heard from some of his teammates that drinking a high protein supplement after football training will improve his muscle mass. He decides to test this hypothesis by examining the effect of a high protein drink on some of his teammates compared with what happens with a control group who drink only water. Which of the following would be the best control for his experiment? a. randomly selected teammates who are given only small amounts of a protein drink b. volunteers from the general campus population who begin football training and are given a protein drink c. volunteers from the general campus population who are not given any protein drink d. randomly selected teammates in training who are given a placebo instead of a protein drink 6. Which of the following is an appropriate, testable scientific hypothesis? a. Bad people catch more colds than good people. b. Cold viruses should be allowed to reproduce just like anything else. c. It is unethical to go to school when you have a cold. d. People catch colds because of exposure to cold temperature. 7. Experimental results with statistical significance mean that: a. the hypothesis being tested has been proved to be correct. b. the experiment had no participant or researcher bias. c. the experiment had well designed controls and treatments. d. a difference between treatment and control groups likely exists. 8. A news report on CNN that describes recently published research on a new treatment for colds is an example of a(n): a. anecdote. b. primary source. c. secondary source. d. advertisement. 9. Which of the following statements is an appropriate, testable scientific hypothesis? a. Mean people get cancer more often than nice people. b. Eating fish reduces the chance of having a stroke. c. Embryonic stem cell research is unethical. d. Accountants are not fun people. 10. Suppose I make the following statement to a friend: “After comparing the talent on their team roster to other teams, it is my theory that the Diamondbacks will have the best record in baseball this year.” From a scientific standpoint, what I really meant to say is: a. “After comparing the talent on their team roster to other teams, it is a fact that the Diamondbacks will have the best record in baseball this year.” b. “After comparing the talent on their team roster to other teams, I have faith that the Diamondbacks will have the best record in baseball this year.”3 c. “After comparing the talent on their team roster to other teams, it is my hypothesis that the Diamondbacks will have the best record in baseball this year.” d. “After comparing the talent on their team roster to other teams, I am absolutely sure that the Diamondbacks will have the best record in baseball this year.” 11. Inductive reasoning is: a. biased and subjective. b. unbiased and objective. c. more reliable than deductive reasoning for making predictions. d. referred to as logic. 12. Which of the following statements is the best prediction based on the hypothesis that fish species have decreased in number in a particular lake because of recreational boats? a. If a lake is disturbed by boats, then the number of fish species will decrease. b. If boats are on a lake, then the fish will become too frightened to reproduce. c. If boats are in a lake, then the environment will be damaged such that it can no longer support most fish species. d. If fish numbers decrease in a lake, then boats must have affected the environment. 13. There is a strong correlation between stress and susceptibility to colds. This means that: a. stress must directly cause susceptibility to colds. b. a high susceptibility to colds must directly cause stress. c. people with