1. In context, which is the best way to revise and combine sentences 1 and 2?
A. The fossils of sauropods, the long-necked giants who are known today as the largest dinosaurs, have baffled scientists for decades. Correct
B. Sauropods, long-necked giants, are known today as the largest dinosaurs whose fossils have baffled scientists for decades.
C. Scientists have been baffled for decades by sauropod fossils; they are known today as the largest dinosaurs, being giants with long necks.
D. [no change]
Explanation
<h2>The fossils of sauropods, the long-necked giants who are known today as the largest dinosaurs, have baffled scientists for decades.</h2>
This revision effectively combines the two original sentences while maintaining clarity and coherence, emphasizing both the identity of sauropods and the mystery surrounding their fossils.
<b>A) The fossils of sauropods, the long-necked giants who are known today as the largest dinosaurs, have baffled scientists for decades.</b>
This option combines the ideas seamlessly, clearly identifying sauropods and their fossils while providing a natural flow of information. It highlights the subject (fossils) first and clarifies the description of sauropods as both long-necked and the largest dinosaurs.
<b>B) Sauropods, long-necked giants, are known today as the largest dinosaurs whose fossils have baffled scientists for decades.</b>
While this option maintains the key details, it awkwardly places the explanation of their fossils at the end, which disrupts the flow. The structure makes it less direct and concise than option A.
<b>C) Scientists have been baffled for decades by sauropod fossils; they are known today as the largest dinosaurs, being giants with long necks.</b>
This choice introduces an unnecessary passive construction and adds complexity with a semicolon, making it less straightforward. It also leads with scientists instead of the subject of fossils, which detracts from the primary focus.
<b>D) [no change]</b>
This option does not revise or combine the sentences, missing the opportunity for improved clarity and conciseness. Keeping the original structure may lead to redundancy and a more confusing reading experience.
<b>Conclusion</b>
Option A is the best choice for revising and combining sentences 1 and 2 because it presents the information clearly and effectively, ensuring that the identity of sauropods and the perplexity of their fossils are articulated in a coherent manner. The other options either complicate the structure or fail to enhance the original content, demonstrating that clarity is paramount in effective writing.
2. Which is the best version of the underlined portion of sentence 6? have confirmed that, these resilient animals, did indeed walk the earth
A. (as it is now)
B. that, these resilient animals
C. that these resilient animals,
D. that these resilient animals Correct
Explanation
<h2>that these resilient animals</h2>
The phrase "that these resilient animals" provides a clear and grammatically correct introduction to the clause that follows, enhancing the readability and coherence of the sentence. This version eliminates unnecessary punctuation, allowing the sentence to flow more smoothly.
<b>A) (as it is now)</b>
This choice retains the original phrasing, which includes an unnecessary comma after "that." The comma disrupts the flow of the sentence and is grammatically incorrect, making this option less effective than the other choices.
<b>B) that, these resilient animals</b>
This option incorrectly places a comma after "that," which is not appropriate in this context. The comma creates an awkward pause that interferes with the structure of the sentence, resulting in a lack of clarity.
<b>C) that these resilient animals,</b>
While this choice removes the comma after "that," it incorrectly places a comma after "animals." This punctuation is unnecessary and disrupts the continuity of the sentence, making it less effective than the correct choice.
<b>Conclusion</b>
In conclusion, the best version of the underlined portion in sentence 6 is "that these resilient animals," as it provides a clear and grammatically correct transition to the following clause. By eliminating unnecessary commas, this option enhances the overall readability and coherence of the sentence, ensuring that the reader can easily understand the intended message.
3. Which is the best version of the underlined portion of sentence 5? suggested that sauropods will have existed, on land
A. (as it is now)
B. exist,
C. existed, Correct
D. will exist,
Explanation
<h2>Existed</h2>
The correct choice is "existed," as it accurately reflects the past tense needed to convey that sauropods lived on land for an extended period, aligning with the context of the sentence and the surrounding narrative about their history.
<b>A) (as it is now)</b>
This option maintains the original phrasing, which is grammatically incorrect due to the use of "will have existed." The sentence requires a straightforward past tense verb to align with the established timeline of sauropods' existence.
<b>B) exist,</b>
Using "exist" changes the verb tense to present, which is inconsistent with the context of the sentence that discusses a historical timeframe. It implies that sauropods are still living, which contradicts the information provided in the passage about their extinction.
<b>D) will exist,</b>
This choice employs the future tense and suggests that sauropods are anticipated to exist in the future, which is factually incorrect. The passage discusses the historical existence of sauropods, making this option unsuitable as it misrepresents the timeline.
<b>Conclusion</b>
In summary, the proper tense choice for the underlined portion in sentence 5 is "existed," reflecting the historical context of sauropods living on land for millions of years. The other options either misalign with the timeline of the subject or introduce grammatical inaccuracies, failing to convey the intended meaning of the passage accurately.
4. Which of the following sentences would best be inserted between sentences 11 and 12?
A. Like all dinosaurs, sauropods hatched from eggs.
B. This rather implausible conclusion nonetheless persisted for years. Correct
C. For decades, sauropods were considered emblematic of the phenomenon of extinction.
D. Sauropod fossils continue to be discovered in regions spread across the globe.
Explanation
<h2>This rather implausible conclusion nonetheless persisted for years.</h2>
This statement effectively highlights the ongoing misconception regarding sauropod growth rates prior to more recent scientific discoveries. It bridges the gap between the slow growth estimates based on modern reptiles and the subsequent reevaluation of these assumptions, setting the stage for the new findings about faster growth rates.
<b>A) Like all dinosaurs, sauropods hatched from eggs.</b>
While this statement provides a true fact about sauropods, it does not connect well to the specific context of growth rate discussions. It does not address the misconceptions or the conclusions drawn by early researchers, making it irrelevant for insertion at this point in the passage.
<b>C) For decades, sauropods were considered emblematic of the phenomenon of extinction.</b>
This choice introduces a broader context about extinction that diverges from the focus on growth rates. Although it pertains to sauropods, it does not relate directly to the misunderstanding about their growth, thus failing to serve the narrative flow between the two sentences about growth timeframes.
<b>D) Sauropod fossils continue to be discovered in regions spread across the globe.</b>
While relevant to the overall discussion of sauropod fossils and their discoveries, this statement does not specifically address the misconceptions regarding growth rates. It shifts the focus from the growth rate debate to the geographical distribution of fossils, which is not the intended focus at this point in the text.
<b>Conclusion</b>
The selected statement emphasizes the persistence of erroneous beliefs about sauropod growth rates, effectively linking the outdated conclusions based on reptilian growth patterns to the new insights gained from studying their bones. This transition is crucial for understanding how scientific perspectives evolve with new evidence, particularly in the context of sauropods' remarkable adaptations and longevity on land.
5. Where would the following sentence best be placed? How long did it take sauropods to grow to full adult size?
A. After sentence 3
B. After sentence 8
C. After sentence 9 Correct
D. After sentence 12
Explanation
<h2>How long did it take sauropods to grow to full adult size?</h2>
This sentence fits best after sentence 9, as it logically follows the discussion about the interest in sauropod growth rates and sets the stage for the specifics of their growth patterns.
<b>A) After sentence 3</b>
Placing the sentence here would interrupt the flow of ideas about the physical characteristics and survival challenges of sauropods. Sentence 3 discusses the size of sauropods and the misconceptions about their habitat, while the new sentence focuses on their growth duration, which is not yet relevant at this stage of the passage.
<b>B) After sentence 8</b>
Inserting the sentence after sentence 8 would disrupt the continuity of thought regarding the insights gained from fossil studies. This section emphasizes understanding how sauropods adapted to their environment, but does not yet address the specifics of their growth rates, making the new sentence feel out of context.
<b>C) After sentence 9</b>
This position is ideal as it follows a statement about the focus on growth rates, directly leading into the inquiry about how long it took for sauropods to reach full adult size. It maintains logical progression, allowing for a seamless transition into the subsequent analysis of growth rates based on bone structure.
<b>D) After sentence 12</b>
While this choice could work, as it directly relates to the findings about sauropod growth rates, placing the sentence here would be slightly less effective. It would come after the conclusion of the comparative analysis, making it feel like a retrospective remark rather than a lead-in to the findings discussed.
<b>Conclusion</b>
The placement of the question about how long it took sauropods to grow to full adult size is best situated after sentence 9, where the focus on growth rates is first introduced. This arrangement allows for a coherent flow of information, guiding the reader from the general interest in growth patterns to specific inquiries regarding the duration of growth in these fascinating dinosaurs.