BIOL101 FINAL EXAM

You have formulated a hypothesis that water is necessary for seed germination. To test your hypothesis, one set of lettuce seeds is placed in water with warm temperatures and adequate lighting. Another set of identical seeds is placed in the dry under the same set of conditions. The control in the experiment is (a) seeds in the dry (b) seeds in the light (c) warm temperature (d) adequate humidity (e) germination rate 2. A group of medical researchers recently tested the effects of a cholesterollowering medication, Drug A on men who had high blood levels of cholesterol. The researchers did the following experiment and obtained the indicated results. One group of 150 men took a tablet containing 40 mg of Drug A for 90 days; 120 of this group decreased their blood levels of cholesterol by at least 10 %. Another group of 150 men was given a tablet with no added Drug A for 90 days; 25 of these men decreased their blood levels of cholesterol by at least 10%. Which of the following is the most reasonable and accurate conclusion based on results obtained in this experiment? (a) Drug A is good for men (b) Drug A is found in the blood of men (c) men taking tablets supplemented with Drug A will show a decrease in cholesterol levels in the blood (d) men taking tablets supplemented with Drug A will show an increase in cholesterol levels in the blood (e) blood levels of cholesterol are not affected by oral supplementation of Drug A 4. Which statement best describes the relationship between plants and animals on earth? (a) Plants produce O2 and sugars from CO2 (b) Animals produce CO2 and H2O from sugars and O2 This study source was downloaded by from CourseH on :42:18 GMT -05:00 (c) Plants produce O2 and sugars and animals produce CO2 and H2O (d) Animals produce O2 and sugars and plants produce CO2 and H2O 5. Think of the cell as a factory, in which the organelles are specialized sites of production. All cells have a power plant, the mitochondrion. Plant cells have an additional “reactor” for the production of usable energy. It is called the _____. (a) golgi body (b) rough endoplasmic reticulum (c) central vacuole (d) vesicle (e) chloroplast 6. A researcher planted seeds from four types of wheat (Types A, B, C, and D) in a greenhouse to determine which type of wheat grew fastest. The plants were grown for 10 days and measured. The results are shown below. Choose the data set that demonstrates that Type C wheat grew the fastest. 1 (a) A = 20 cm, B = 11 cm, C= 5 cm, D= 2 cm. 2 (b) A = 2 cm, B = 5 cm, C= 1 cm, D= 2 cm. 3 (c) A = 22 cm, B = 11 cm, C= 25 cm, D= 4 cm. 4 (d) A = 30 cm, B = 12 cm, C= 28 cm, D= 1 cm. 5 (e) A = 21 cm, B = 12 cm, C= 20 cm, D= 15 cm. Use the following information to answer questions 7 & 8 below. A group of medical researchers recently investigated the effects of Drug X on lowering blood pressure in a group of hypertensive middle-aged women. The researchers did the following experiment and obtained the indicated results: One group of 150 women took a tablet containing Drug X for 3 weeks – 95 of these women decreased their blood pressure by at least 10% (three women from this group dropped out of the study). Another group of 150 women was given a tablet with no added Drug X for 3 weeks – 10 of these women decreased their blood pressure by at least 10% (two women from this group dropped out of the study). 7. Which of the following was the control group in this experiment? a. the group of participants that received tablets containing Drug X. b. the group of participants that received tablets that did not contain Drug X c. the number of participants in each group at the beginning of the experiment d. the number of participants in each group at the end of the experiment e. the amount of Drug X contained in the tablet 8. Which of the following is the most reasonable and accurate conclusion based on the results obtained in this experiment? This study source was downloaded by from CourseH on :42:18 GMT -05:00 a. Drug X is good for hypertensive women. b. Drug X is good for both men and women. c. Hypertensive women receiving Drug X for 3 weeks may show a decrease in blood pressure. d. Hypertensive women receiving Drug X for 3 weeks may show an increase in blood pressure. e. Drug X has no effect on blood pressure. Fill in the Blanks: Use below paragraph for next two questions: A group of medical researchers investigated the effects of Drug X on lowering cholesterol levels in a group of men between the ages of 50 and 70 years old. The researchers did the following experiment and obtained the indicated results: One group of 150 men took a tablet containing Drug X for 3 weeks – 95 of these men decreased their cholesterol levels by at least 10% (three men from this group dropped out of the study). Another group of 150 men was given a tablet with no added Drug X for 3 weeks – 10 of these men decreased their cholesterol levels by at least 10% (two men from this group dropped out of the study). 15. Which of the following is the best hypothesis for this experiment? A) Will drug X lower cholesterol levels in men between the age of 50 and 70 years? B) Drug X will lower cholesterol levels in men. C) Since high cholesterol levels significantly increases several health risks for men, drug X is most likely beneficial. D) Men between the age of 50 and 70 years will have reduced cholesterol levels if they take drug X over a 3 week period. E) There is no significant difference in cholesterol levels between men that take drug X and those that don’t take it. 16. Which of the following was the control group in this experiment? A) the amount of Drug X contained in the tablet B) the number of participants in each group at the end of the experiment C) the group of participants that received tablets containing Drug X D) the group of participants that received tablets that did not contain Drug X E) the number of participants in each group at the beginning of the experiment 31. Which of the following statements is *NOT* true? This stud