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Hormones and Starch Content

Test Group 1 Test Group 2 Test Group 3
Pair of ripe apples One ripe apple, one unripe apple Pair of unripe apples

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The presence of ethylene gas causes fruits to ripen. As the fruit ripens, it produces increasing amounts of ethylene. An investigator placed fruit samples sealed containers as shown in the table and left them for three days. At the end of the time period, the investigator used iodine to test for the presence of starch.

Which of the following lists these in order from highest to lowest starch content?


Group 1, Group 2, Group 3.


Group 3, Group 2, Group 1.


Group 1, Group 3, Group 2.


Group 3, Group 1, Group 2.