Todays supermarkets often sell produce grown by large commer - GED Prep
Question
Today's supermarkets often sell produce grown by large commercial farms located in all parts of the country. The marketability of such produce depends on high crop yields and an ability to survive transport over long distances, traits for which plant breeders have selected at the sacrifice of taste.
One such produce item is the tomato. There are different hypotheses explaining why supermarket tomatoes lack flavor. One hypothesis attributes the lack of flavor to low sugar levels in supermarket tomatoes. Another hypothesis theorizes these tomatoes lack an organic compound called geranial, which causes the lack of flavor. The following observations about tomatoes have been made.
1. Many tomatoes bred for commercial sale contain low sugar levels.
2. Heirloom tomatoes-highly flavorful but fragile varieties of tomatoes-contain large amounts of volatile organic compounds, including geranial.
3. People tend to enjoy the flavor of tomatoes that contain geranial and a moderate amount of sugar.
Which additional evidence would best help plant breeders conclude that geranial rather than sugar is ultimately responsible for tomatoes' favor?
Answers
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Explanation
The correct answer is: Tomatoes that contain high levels of sugar but an absence of geranial are not perceived as flavorful.
This evidence would directly support the hypothesis that geranial, not sugar, is the key factor in tomato flavor. By demonstrating that high-sugar tomatoes lacking geranial are still not flavorful, it would eliminate sugar as the primary cause of flavor and point to geranial as the crucial component. This controlled comparison isolates geranial's effect, providing the strongest evidence for plant breeders to conclude geranial's importance in tomato flavor.
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