1. In the scientific method, a hypothesis ____________. A) is a statement of fac
ID: 25997 • Letter: 1
Question
1. In the scientific method, a hypothesis ____________.A) is a statement of fact
B) is a proposed explanation based on observations
C) is usually proven to be correct
D) can only be tested once
E) all of the above
2. What is the correct sequence of steps in the scientific method?
I. State the problem
II. Analyze and interpret the data
III. Develop a hypothesis
IV. Share the results with other scientists
V. Design and perform an experiment to test the hypothesis
A) I>II > III > IV > V
B) III > I > V > II > IV
C) V> IV > III > II > I
D) I> III > V >II > IV
E) V > II > I > III > IV
3. You examine a cell under a microscope and you do not see a well defined nucleus. You conclude that the cell must be a __________________ cell.
A) Eukaryotic
B) Prokaryotic
C) Plant
D) Animal
4. The form of RNA that is complementary to DNA and carries information from the DNA to the site where protein is synthesized as directed by the genetic code/the location where such protein synthesis occurs.
A) messenger RNA/nucleus
B) transfer RNA/cytosol
C) messenger RNA/cytosol
D) ribosomal RNA/nucleus
E) messenger RNA/nucleus
5. You have formulated a hypothesis that light is necessary for seed germination.
To test your hypothesis, one set of lettuce seeds is placed in light with warm temperatures and adequate moisture. Another set of identical seeds is placed in the dark under the same set of conditions. The control in the experiment is
A) seeds in the dark
B) seeds in the light
C) warm temperature
D) adequate moisture
E) germination rate
6. A group of medical researchers recently tested the effects of a cholesterol-lowering 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 onresults 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
7. If the amounts of bases in a DNA molecule are measured, you would find that
A) A = C and G = T
B) A = G and C = T
C) T = A and C = G
D) A = U and C = G
E) U= C and A = G
8. 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
C) plants produce O2 and sugars and animals produce CO2 and H2O
D) animals produce O2 and sugars and plants produce CO2 and H2O
9. A substance dissolved in water with a pH greater than 7 is __________, while a substance dissolved in water with a pH less than 7 is __________.
A) neutral, basic
B) acidic, basic
C) basic, acidic
D) neutral, acidic
10. The carbon source for organisms that perform photosynthesis is _______________.
A) carbohydrate
B) carbon dioxide
C) methane
D) glucose
?
Use the following information to answer questions 11&12 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
Explanation / Answer
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