Your friend notices that a particular type of soda (Brand A) makes her have a ho
ID: 270460 • Letter: Y
Question
Your friend notices that a particular type of soda (Brand A) makes her have a horrible stomach ache, while a similar, different brand soda product (Brand B) does not. This leads her to hypothesize that Brand A soda is more destructive to animal tissues compared to Brand B. To this hypothesis, she buys a steak and cuts it into small equal size cubes. Each cube weighs 10 grams. In three different cups, she places a single cube of steak and adds a sufficient amount of Brand A soda to cover the cube. She does the same thing for three more cubes of steak into three new cups, but uses Brand B soda. She lets all sik cups sit overnight, and the next morning, she takes out each steak cube and measures their weight. Her results are as follows: Brand A Soda Steak Cubes 5.6 grams 5.2 grams 4.5 grams Brand B Soda Steak Cubes 7.3 grams 77 grams 6.9 grams She asks you for help in interpreting her data and for your input regarding her experimental setup. Address the following: a) Is her hypothesis supported or not? b) READ CAREFULLY: Address her experimental design quality by doing only one of the following Answer #1 below if you think it is of good quality. Answer #2 below if you think it is not of good quality. 1. If it is good quality, do you think it would make a different is she had used a larger volume of soda? Why or why not.Explanation / Answer
1. Brand A soda does cause more type of animal tissue destruction compared to brand B as the weight of steak treated with soda A has less weight compared to ones treated with soda B provided the cubes would have weighed initially the same before the start of the experiment. Her hypothesis that it may have caused more damage to her stomach may be partially correct as she needs to perform more number of experiments to prove her hypothesis, may be through molecualm mechanisms.
B. Her experimental set up is not of a good quality as she needs more number of positive and negative controls to.conclude her hypothesis. Apart from that, she needs to prove the same by molecular mechanisms that contribute to tissue damage. Also physical appearance of the tissue through microscopy would also enable her to do justice to the hypothesis.
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