PrepTest 138, Section 1, Question 10
The characteristic smell or taste of a plant,(453 more words not shown)
In the passage, the author(7 more words not shown)
- Aprovide information about(6 more words not shown)
- Bhelp explain what(3 more words not shown)
- Chelp distinguish between(8 more words not shown)
- Dindicate the great(10 more words not shown)
- Eprovide evidence of(4 more words not shown)
Reading the passage
The main subject is secondary substances. Why introduce primary ones first? They give us a contrast: proteins, carbohydrates and similar chemicals support internal growth and functioning, while secondary substances have no known role in those processes. Understanding the familiar category helps us understand what distinguishes the category the author will explore.
Working the answers
- A
Growth and metabolism are mentioned, but only to identify the role of primary substances. We don't receive an explanation of how those processes work. This confuses background used for a contrast with the purpose of the discussion.
- BCorrect
Defining primary substances helps explain secondary ones by contrast. The categories are distinguished before the author turns to the insects' role in the secondary chemicals' evolution.
- C
Primary versus secondary is not presented as two different ways insects influence evolution. The contrast concerns what the substances do within plants.
- D
The point isn't simply to display how many chemicals plants contain. It is to distinguish two categories by their roles and occurrence.
- E
The later discussion provides examples of adaptation involving secondary substances. The initial description of proteins, carbohydrates and other primary substances is not evidence of an adaptation to insects.
More Author's Opinion questions
Learn the LSAT our way
Our platform drills Author's Opinion questions at your level and adjusts as you improve.