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Zorluk: OrtaColons

Deep-sea hydrothermal vents support unique ecosystems that thrive in complete darkness, miles below the ocean's surface. These ecosystems rely on a process that is entirely independent of sunlight: chemosynthetic bacteria convert toxic chemical compounds into organic energy to form the foundation of the food web.

Which of the following alternatives to the underlined portion is grammatically correct?

  1. NO CHANGECevap
  2. B
    sunlight, because: chemosynthetic
  3. C
    sunlight, chemosynthetic
  4. D
    sunlight; which chemosynthetic

Cevap

The correct answer is the option that keeps the original punctuation (NO CHANGE), which uses a colon to correctly introduce an explanatory independent clause after another independent clause.
The correct choice is the option that makes no changes. The colon is correctly used here because the clause preceding it ('These ecosystems rely on a process that is entirely independent of sunlight') is an independent clause, and the clause following it explains that process.

Adım Adım Çözüm

1
Analyze the clause preceding the punctuation mark to determine if it is independent.
The clause 'These ecosystems rely on a process that is entirely independent of sunlight' has a subject and a verb and can stand alone as a complete sentence, making it independent.
A colon must be preceded by an independent clause.
2
Analyze the clause following the punctuation mark.
The clause 'chemosynthetic bacteria convert toxic chemical compounds into organic energy to form the foundation of the food web' is also an independent clause that directly explains the 'process' mentioned in the first clause.
A colon is appropriate for connecting two independent clauses when the second explains, clarifies, or illustrates the first.
3
Evaluate the alternative choices against grammatical constraints.
Placing a colon after 'because' creates an incomplete clause before the colon. Using a comma alone creates a comma splice. Using a semicolon before 'which' creates a sentence fragment because 'which' introduces a dependent clause.
Eliminating the choices with grammatical errors leaves only the correct, original punctuation.

Anahtar Kavram

A colon must be preceded by an independent clause (a complete thought). It can be followed by an independent clause, a list, or a clarifying word or phrase, provided that the relationship is one of explanation or elaboration.
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Konular

Colons

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