PrepTest 122, Section 3, Question 22
Every culture that has adopted the cultivation of(465 more words not shown)
Which one of the following(18 more words not shown)
- AThe author suggests(40 more words not shown)
- BThe author explains(33 more words not shown)
- CThe author describes(28 more words not shown)
- DThe author describes(33 more words not shown)
- EThe author introduces(29 more words not shown)
Reading the passage
Paragraph two explains the ordinary process of photosynthesis and then introduces a problem: oxygen can interfere with rubisco. Paragraph three describes how some plants avoid that problem by separating the relevant processes.
What we’re looking for
So the structure is process, obstacle, solution. We're explaining why maize is productive, not tracing how people began growing it.
Working the answers
- A
This starts with widespread cultivation and high yield, which belong to the opening context. It also promises reasons for the enzyme's evolution. These paragraphs describe a protective mechanism; they don't explain why rubisco evolved.
- BCorrect
The biochemical process is photosynthesis, the hindrance is oxygen's interference, and the evolutionary solution is the C-4 arrangement that protects sugar production. Each part matches the sequence we identified.
- C
There aren't two solutions followed by an evolutionary explanation of one. Separating the processes and transporting carbon dioxide in a nongas form are parts of the same C-4 arrangement.
- D
Cultural effects belong to the first paragraph. The two paragraphs asked about explain the biochemical process, rather than organizing the discussion around a cultural phenomenon.
- E
We aren't replacing an accepted explanation of photosynthesis with a competing evolutionary account. We learn how photosynthesis works, what can hinder it, and how certain plants avoid that hindrance.
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