Set 7: Form, Structure & Sense (Advanced)
Explanation
PASSAGE
Recent studies show that the organism's ability to survive without water for extended periods, an adaptation to arid _______ enables it to thrive in environments inhospitable to most life forms.
Which choice completes the text so that it conforms to the conventions of Standard English?
Detailed Answer Explanation
[Variation 1] This question tests your understanding of sentence function and text organization. The appositive 'an adaptation to arid environments' is parenthetical. A comma closes this phrase before the main verb 'enables.' Each sentence in a well-constructed text serves a specific purpose. Consider what role this sentence plays in the argument: does it introduce, support, contrast, or conclude an idea? Understanding why an author includes specific sentences helps you grasp the overall argument. Each sentence should serve a clear purpose: introducing ideas, providing evidence, acknowledging counterarguments, or drawing conclusions. Identify the role to understand the structure.
Key Evidence:
• "The organism's ability...an adaptation to arid"
• "enables it to thrive"
Why others are wrong: D (Missing punctuation fails to close the appositive phrase.), B (A semicolon is too strong for closing an appositive.), A (A colon doesn't fit for closing an appositive.).