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Zorluk: Çok zorClause Boundaries and Linking

Discovered in the late twentieth century, deep-sea hydrothermal vents support complex ecosystems that thrive in complete darkness, far beyond the reach of solar radiation. Rather than utilizing photosynthesis to produce food, the diverse organisms inhabiting these extreme environments rely on a process known as chemosynthesis ______ specialized bacteria oxidize toxic hydrogen sulfide dissolved in the geothermal fluids, thereby generating the organic carbon that sustains the entire local food web.

Which choice completes the text so that it conforms to the conventions of Standard English?

  1. A
    chemosynthesis, specialized
  2. B
    chemosynthesis specialized
  3. chemosynthesis: specializedCevap
  4. D
    chemosynthesis, but specialized

Cevap

The correct choice is the option that uses a colon to separate the two independent clauses, as the second clause explains the process of chemosynthesis introduced in the first clause.
The correct choice is the option that uses a colon to separate the two independent clauses. The clause before the blank and the clause after the blank are both independent. A colon is grammatically correct here because the second clause directly explains and details the concept of chemosynthesis mentioned in the first clause.

Adım Adım Çözüm

1
Identify the clause boundaries and determine if the clauses on either side of the blank are independent.
The clause before the blank contains a subject ('organisms') and a verb ('rely') and constitutes a complete thought. The clause after the blank also contains a subject ('bacteria') and a verb ('oxidize') and constitutes a complete thought. Both are independent clauses.
Determining the grammatical independence of the clauses dictates the types of punctuation or conjunctions allowed to join them.
2
Analyze the logical relationship between the first and second independent clauses.
The second clause explains the chemical process that defines 'chemosynthesis' mentioned at the end of the first clause.
Understanding how the two ideas connect determines which transitional punctuation mark or coordinating conjunction is appropriate.
3
Evaluate the grammar of the choices to select the one that correctly links the clauses.
Using a colon is correct because a colon can link two independent clauses when the second explains, illustrates, or expands on the first. Other choices result in a comma splice, a run-on, or a logical contradiction.
Only one choice successfully links the clauses grammatically and logically without violating Standard English conventions.

Anahtar Kavram

Connecting independent clauses using a colon when the second clause explains or illustrates the first.
Tahmini Süre:1m 15s
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Konular

Clause Boundaries and Linking

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