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Zorluk: OrtaPunctuation of Nonessential Elements

The passage below contains a blank. Which punctuation mark correctly sets off the nonessential element in the sentence?

Cevap:In 1953, botanist Katherine Esau published her landmark book *Plant Anatomy*, which remains a definitive text on plant biology. Prior to Esau's work, the field focused primarily on static descriptions of plant tissues. Esau, who was awarded the National Medal of Science in 1989 【,】 revolutionized the study of plant anatomy by integrating microscopic structural details with dynamic developmental processes.

Cevap

comma (or ,)
The correct answer is a comma. The relative clause 'who was awarded the National Medal of Science in 1989' is nonessential and must be separated from the rest of the sentence. Since a comma is used immediately after 'Esau' to introduce the clause, a matching comma must be placed after '1989' to close the clause before the main verb 'revolutionized'.

Adım Adım Çözüm

1
Identify the nonessential clause in the sentence.
The phrase 'who was awarded the National Medal of Science in 1989' is a nonessential relative clause modifying the proper noun 'Esau'.
This clause provides descriptive information that is not essential to identifying the subject or understanding the core meaning of the main clause.
2
Identify the punctuation mark used to introduce the clause.
A comma is placed immediately after 'Esau' to open the clause.
Nonessential elements must be set off with matching pairs of punctuation to maintain grammatical symmetry.
3
Select the matching punctuation mark to close the clause.
A comma is required in the blank after '1989' to close the clause before the verb 'revolutionized'.
Using any other punctuation mark (like a dash or parenthesis) or omitting the punctuation entirely would result in asymmetrical punctuation, which is incorrect in Standard English.

Anahtar Kavram

Punctuation of Nonessential Elements
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Punctuation of Nonessential Elements

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