) Use the following information when answering the following question Use the 3)
ID: 145415 • Letter: #
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) Use the following information when answering the following question Use the 3) uncesco Redi performed a series of experiments on spontaneous generation. He began by r pieces of meat into eight identical jars. Four jars were left open to the air, and four completely, he p ) In both experiments, he monitored did the same experiment with one variation: Instead of sealing four of the jars the jars and recorded whether or not maggots covered them with gauze (the gauze excluded the flies while allowing the meat to flies) appeared in the meat in both experiments, files appeared in all of the open jars and only in the opoen jars Which one of the following statements is correct? A) The experiment was inconclusive because Redi used only one kind of meat D The experiment supports the hypothesis that spontaneous generation occurs in rotting meat C) The experiment supports the hypothesis that maggots arise only from eggs laid by adult flies D) The experiment was inconclusive because it did not run long enough. 4) A controlled experiment A) is repeated many times to ensure that the results are accurate B) includes one group for which the scientist controls all variables C) includes at least two groups, one of which does not receive the experimental treatment D) includes at least two groups, one differing from the other by two or more variables 5) The best experimental design 5) A) alters only one condition between the controls and the experimental condition B) includes a large sample size for each condition Oincludes a large sample size and a control, and alters only one condition between the controls and the experimental condition D) includes a control 6) The temperature at which an alligator's egg is incubated will determine the sex of the offspring6 The dependent and the independent variables in this experiment are A) size of the incubator and size of the baby alligator respectively B) number of offspring and temperature in the incubator respectively C) sex of the baby alligator and temperature respectively D temperature and sex of the baby alligator respectively 7) In presenting data that result from an experiment, a group of students show that most of their measurements fall on a straight diagonal line on their graph. However, two of their data points are outliers" and fall far to one side of the expected relationship. What should they do? A) Do not show these points because clearly something went wrong in the experiment. Show all results obtained and then try to explore the reason(s) for these outliers. C) Average several trials, rule out the improbable results, and do not show them in the final work D) Change the details of the experiment until they can obtain the expected results. 8) A scientist, who wants to study the effects of nitrogen on wheat plants sets up an experiment with s)D 4 groups of wheat plants: group A gets 20 pounds per acre, group B gets 40 pounds per acre, group C gets 60 pounds per acre, and group D gets 0 pounds per acre. Which of the following is the control group? A) group A B) group B C) group C D/group DExplanation / Answer
3. Option C: Maggots appeared only at the open jars which suggests if the flies cannot lay eggs on the meat, there would be no spontaneous generation of any maggots in the jars.
4.Option C: Controlled experiment will always have one group that is similar to the other test groups but will not receive any treatment.
5.Option C: Large sample gives significance to the observation pertaining to experiment which is good. Moreover, a good experimental design should only alter one condition (variable) when compared to the control.
6.Option C: Independent variable is a variable that the scientist can vary, in this case is the 'Temperature'. Dependant variable is the variable that depends on the changes in the independent variable (in this case sex of the offspring is dependent variable).
7.Option B: A good lab practice is to show what you observed in an experiment. So, one should show all the outlier data inputs and try to explian them.
8.Option D: Control group is the group which receives no treatment.
9.Option B: If the two species are from the same genus we can assume that they will be more similar when compared to the species from other genus.
10.Option D : Correct.
11.Option D : A good model organism should be a well studied organism which is easy to grow and maintain but most importantly should reflect the the experimental findings in the actual system.
12.Option D : correct option.
NOTE: First 10 sub-questions have been answered with discussion. Feel free to comment if you want me to answer any specific question. please specify the question number. Thank you.
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