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23 October, 16:27

A student has four snails, four sprigs of elodea, eight test tubes of bromothymol blue, and two rooms (light and dark). the student wants to know what gases are produced by the snails and elodea in light and dark conditions. assuming the student only has time for one experiment, what setup will yield the most complete data?

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  1. 23 October, 19:28
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    The student can make the following setup:

    Fill all of the test tubes slightly with bromothymol blue

    Put the 4 snails in test tubes and the 4 elodea sprigs in test tubes

    Put two of each organism in a dark room and two in a well lit room

    After a day, check the color of bromothymol blue solution in each test tube. The indicator will have turned yellow if carbon dioxide is produced and absorbed into the solution.

    Continue the experiment for the desired time period making sure the temperature and other variables are constant and the specimen are well cared for.
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