PrepTest 138, Section 1, Question 13
The characteristic smell or taste of a plant,(453 more words not shown)
The passage most strongly suggests(13 more words not shown)
- ASome of them(9 more words not shown)
- BThey typically contribute(9 more words not shown)
- CSome of them(14 more words not shown)
- DSome species of(6 more words not shown)
- EA few of(10 more words not shown)
Reading the passage
Secondary substances aren't described as a fixed collection produced only in the distant past. The second paragraph says that new ones continue to appear through genetic mutations. That gives us direct support for an ongoing process, even though the larger plant-insect relationship has existed for hundreds of millions of years.
Working the answers
- ACorrect
“New ones continue to appear” supports some secondary substances resulting from recent mutations. We don't need outside knowledge that evolution continues; the text tells us the process is still happening.
- B
Nothing makes taste and smell mutually exclusive effects. The author doesn't say a substance typically contributes to only one of them.
- C
Interaction between plants and insects is described, but not a chemical reaction between plant substances and insect-produced substances that changes the plant's composition.
- D
A species having only a few of the many secondary substances doesn't establish that any particular species has exactly one. That specific count is not supplied.
- E
No role regulating production of primary substances is identified. The stated lack of a known role in internal growth and metabolic processes gives us no basis for adding this regulatory function.
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