Examkin

Conventions of Punctuation

374 questions

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Question 61Question →

To prepare for the winter storm, the two family's houses were reinforced with extra insulation and storm shutters. Which of the following options represents the correct punctuation for the underlined portion?

Show answer & explanation

Answer: families'

Answer

The correct answer is the plural possessive form 'families'' because the sentence refers to two families who own houses.
The plural possessive form 'families'' is correct because the word 'two' establishes that multiple families are being referenced, and they own the houses being described. For plural nouns ending in 's', possession is shown by adding only an apostrophe at the end of the word.

Step-by-Step Solution

1
Identify if the underlined noun is singular or plural based on the context.
The modifier 'two' indicates that the noun refers to more than one family, so the plural form 'families' is required.
To determine the correct base noun form before applying possessive punctuation.
2
Determine whether possession is required in the sentence.
The noun modifies 'houses', showing that the houses belong to the families, so a possessive form is necessary.
To decide if an apostrophe is needed to show ownership.
3
Apply the correct apostrophe rule for regular plural nouns ending in 's'.
For a plural noun ending in 's', the apostrophe is placed after the 's', resulting in 'families''.
To correctly format the plural possessive noun.

Key Concept

Plural Possessive Nouns
Question 62Question →

During the nineteenth century, Japanese art exerted a profound influence on European Impressionists. The artist who created *The Great Wave off Kanagawa*, Katsushika Hokusai, lived a modest life despite his widespread fame. His innovative use of perspective and color transformed how Western artists depicted the natural world.

Which of the following options represents the correct punctuation for the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

The correct option is the one that leaves the sentence unchanged, correctly setting off only the nonessential appositive name with a pair of commas while keeping the restrictive clause integrated without commas.
The correct option maintains the proper punctuation: the restrictive clause is not set off by commas, and the nonessential appositive is enclosed by a pair of commas.

Step-by-Step Solution

1
Determine if the relative clause is essential or nonessential.
The clause 'who created *The Great Wave off Kanagawa*' is essential (restrictive) because it specifies which particular artist is being discussed. Therefore, no comma should precede it.
Restrictive clauses are necessary for the sentence's meaning and should not be set off with commas.
2
Identify the role of the name following the relative clause.
The name 'Katsushika Hokusai' acts as an appositive. Since the preceding clause has already identified a unique artist, the name is nonessential (parenthetical) and must be enclosed in a pair of commas.
Nonessential appositives require commas both before and after them when they appear in the middle of a sentence.

Key Concept

Distinguishing between restrictive (essential) and nonrestrictive (nonessential) elements to apply commas correctly.
Question 63Question →

Translators of the Epic of Gilgamesh must navigate fragmented clay tablets; because many cuneiform signs have multiple meanings, they must frequently make subjective choices to reconstruct the narrative flow. Which of the following choices correctly punctuates the underlined portion of the sentence?

Show answer & explanation

Answer: tablets; because many cuneiform signs have multiple meanings, they

Answer

The choice that uses a semicolon after 'tablets' and a comma after 'meanings' to correctly separate the independent clauses without creating a fragment or comma splice.
The correct option correctly uses a semicolon to separate two independent clauses: the first clause ('Translators of the Epic of Gilgamesh must navigate fragmented clay tablets') and the second clause ('because many cuneiform signs have multiple meanings, they must frequently make subjective choices to reconstruct the narrative flow'). The comma after 'meanings' is also correctly used to set off the introductory dependent clause within the second independent clause.

Step-by-Step Solution

1
Identify the main clauses in the sentence.
The sentence consists of two main independent clauses: 'Translators of the Epic of Gilgamesh must navigate fragmented clay tablets' and 'Because many cuneiform signs have multiple meanings, they must frequently make subjective choices to reconstruct the narrative flow.'
To determine the correct punctuation, we must analyze the grammatical completeness of each part of the sentence.
2
Select the appropriate punctuation to link these independent clauses.
Since there is no coordinating conjunction (like 'and', 'but', or 'so') between the two main clauses, they must be separated by either a period or a semicolon.
Joining independent clauses with only a comma creates a comma splice error.
3
Verify internal punctuation within the second independent clause.
The second clause begins with a dependent clause ('Because many cuneiform signs have multiple meanings'), which must be followed by a comma before introducing the main subject ('they').
Introductory dependent clauses must be set off by a comma, but separating them with a semicolon would incorrectly create a fragment.

Key Concept

Semicolons are used to link two independent clauses that are closely related in thought, even when the second independent clause begins with a dependent clause.
Question 64Question →

Although the two research vessels collected data on different whale migration routes, each crews' findings depended on it's sonar array.

Which of the following choices represents the correct punctuation and usage for the underlined portion of the sentence?

Show answer & explanation

Answer: crew's findings depended on its

Answer

crew's findings depended on its
The correct option correctly pairs the singular determiner 'each' with the singular possessive 'crew's' and uses the possessive pronoun 'its' to modify 'sonar array'.

Step-by-Step Solution

1
Determine whether the noun 'crew' should be singular or plural.
The noun must be singular ('crew') because it is modified by the singular determiner 'each'.
The determiner 'each' always precedes singular countable nouns in this context.
2
Determine the correct possessive form for the singular noun 'crew'.
The correct form is 'crew's'.
Singular possessive nouns are formed by adding an apostrophe followed by 's'.
3
Determine whether to use the possessive pronoun 'its' or the contraction 'it's' to modify 'sonar array'.
The correct word is the possessive pronoun 'its'.
The sentence requires a possessive relationship for the sonar array. The contraction 'it's' stands for 'it is' or 'it has' and is grammatically incorrect here.

Key Concept

Apostrophes for Possessives and Contractions
Estimated Time:45s
Question 65Question →

For decades, scholars believed that the Bronze Age clay tablets discovered in Crete could never be translated. The self-taught linguist and architect, who deciphered the script, Michael Ventris, was not a professional academic. His successful translation of Linear B in 1952 proved that the language of ancient Mycenae was actually an early form of Greek.

Which of the following choices is the best punctuation for the underlined portion of the sentence?

Show answer & explanation

Answer: architect who deciphered the script, Michael Ventris, was

Answer

The correct punctuation is 'architect who deciphered the script, Michael Ventris, was'.
The correct choice removes the comma before the relative clause 'who deciphered the script' because it is restrictive, and keeps both commas around the name 'Michael Ventris' because it is a nonessential appositive.

Step-by-Step Solution

1
Identify the role of the relative clause 'who deciphered the script'.
The clause is restrictive (essential) because it defines which specific linguist and architect is being discussed.
Restrictive clauses should not be separated from their referent by commas.
2
Identify the role of the name 'Michael Ventris'.
The name is a nonessential appositive because the preceding phrase 'The self-taught linguist and architect who deciphered the script' already uniquely identifies him.
Nonessential appositives must be set off by a pair of commas (one before and one after).
3
Evaluate the options to find the one that removes the comma before 'who' and includes both commas around 'Michael Ventris'.
The option containing 'architect who deciphered the script, Michael Ventris, was' is correct.
It satisfies both punctuation rules and avoids fragments or misplaced punctuation.

Key Concept

Commas with Nonessential and Parenthetical Elements
Question 66Question →

During Napoleon’s military campaign in Egypt, French soldiers uncovered a large stone slab near the town of Rashid. The artifact , which featured the same decree written in three different scripts, eventually allowed scholars to decipher ancient Egyptian hieroglyphs. This breakthrough opened a window into a civilization that had been silent for centuries.

Which of the following choices is the best punctuation for the underlined portion of the passage?

Show answer & explanation

Answer: NO CHANGE

Answer

The option containing the relative pronoun 'which' enclosed by a pair of commas
The clause 'which featured the same decree written in three different scripts' is nonessential because the sentence remains grammatically complete and clear without it. Nonessential elements in the middle of a sentence must be set off by a pair of commas. The original phrasing correctly starts the clause with a comma before 'which' and closes it with a comma after 'scripts'.

Step-by-Step Solution

1
Determine if the underlined clause is essential or nonessential to the meaning of the sentence.
The clause 'which featured the same decree written in three different scripts' provides optional descriptive details about the Rosetta Stone artifact. Because the identity of the artifact is already established, the clause is nonessential.
Nonessential clauses must be set off from the rest of the sentence using punctuation.
2
Choose the punctuation pattern that correctly isolates the nonessential clause.
A pair of commas (one before the relative pronoun 'which' and one after the noun phrase 'three different scripts') must enclose the clause. The relative pronoun 'which' is standard for nonessential relative clauses.
Omitting one of the commas, using the restrictive pronoun 'that' with commas, or using a semicolon to separate the clause all violate standard grammatical conventions.

Key Concept

Commas with Nonessential and Parenthetical Elements
Estimated Time:45s
Question 67Question →

Deep-sea hydrothermal vents support thriving ecosystems in the darkest depths of the ocean, they rely on chemosynthesis rather than photosynthesis to produce energy.

Which of the following options represents the correct punctuation for the underlined portion of the sentence?

Show answer & explanation

Answer: ocean; they

Answer

The correct choice is the option that replaces the comma with a semicolon to separate the two independent clauses without any coordinating conjunctions.
The correct choice uses a semicolon to connect two independent clauses that are closely related in thought. Since both 'Deep-sea hydrothermal vents support thriving ecosystems in the darkest depths of the ocean' and 'they rely on chemosynthesis rather than photosynthesis to produce energy' are complete thoughts that can stand alone as sentences, a semicolon is the appropriate punctuation mark to link them without a coordinating conjunction.

Step-by-Step Solution

1
Identify the two clauses in the sentence and determine if they are independent or dependent.
The first clause ('Deep-sea hydrothermal vents support thriving ecosystems in the darkest depths of the ocean') and the second clause ('they rely on chemosynthesis rather than photosynthesis to produce energy') are both independent clauses because they can stand alone as complete sentences.
Correct punctuation depends on the structural relationship of the clauses being joined.
2
Evaluate the current punctuation and the available options to join the independent clauses correctly.
The original sentence uses a comma to join the clauses, which is a comma splice. A semicolon alone can join two independent clauses without a coordinating conjunction. Therefore, the option with the semicolon is the correct choice.
To fix a comma splice, you can use a semicolon, or a comma paired with a coordinating conjunction.

Key Concept

Using semicolons to link independent clauses
Question 68Question →

Despite the fact that the two sister cities share a single watershed, each municipality's citizens are responsible for it's preservation.

Which choice most clearly and correctly punctuates the underlined portion of the sentence?

Show answer & explanation

Answer: municipality's citizens are responsible for its

Answer

The correct choice is the one that uses the singular possessive noun 'municipality's' and the possessive pronoun 'its'.
The correct option correctly uses the singular possessive noun 'municipality's' and the possessive pronoun 'its'. Since the distributor 'each' is singular, the noun it modifies must be the singular possessive 'municipality's' (not the plural possessive 'municipalities''). To show possession for the singular noun 'watershed', the possessive pronoun 'its' must be used without an apostrophe, as 'it's' is a contraction for 'it is' or 'it has'.

Step-by-Step Solution

1
Determine if the noun preceding the citizens should be singular or plural.
The distributor 'each' is grammatically singular and must modify a singular noun. Therefore, we must use the singular form 'municipality' rather than the plural 'municipalities'.
This establishes the correct grammatical number for the noun.
2
Determine the correct possessive punctuation for the singular noun 'municipality'.
To show that the citizens belong to the municipality, we add an apostrophe and 's' to the singular noun, resulting in 'municipality's'.
This applies the standard rule for singular noun possession.
3
Determine the correct pronoun form to indicate possession of the watershed.
The sentence requires a possessive pronoun referring to the singular 'watershed'. The correct possessive pronoun is 'its'. We must avoid the contraction 'it's' (it is) and the non-existent form 'its'.
This ensures the pronoun conveys possession rather than a contraction.

Key Concept

Apostrophes for Possessives and Contractions
Estimated Time:45s
Question 69Question →

Read the sentence and choose the best replacement for the underlined portion.

During the excavation of the ancient Roman villa, when the three archaeologists uncovered a detailed mosaic, the archaeologists' primary goal was to protect it's delicate glass tiles from environmental damage.

Which of the following options represents the correct punctuation and usage for this sentence?

Show answer & explanation

Answer: archaeologists' primary goal was to protect its

Answer

archaeologists' primary goal was to protect its
The correct option correctly uses the plural possessive noun 'archaeologists'' to modify 'primary goal' since there are three archaeologists. It also correctly uses the possessive pronoun 'its' to refer to the tiles belonging to the mosaic.

Step-by-Step Solution

1
Determine if the noun 'archaeologists' should be singular or plural, and if it requires a possessive form.
The sentence mentions 'three archaeologists', which means the noun must be plural. The goal belongs to these archaeologists, so a plural possessive form is required: 'archaeologists'.
Plural nouns ending in -s form their possessives by adding an apostrophe after the -s.
2
Determine whether to use 'its' or 'it's' to modify 'delicate glass tiles'.
The tiles belong to the mosaic, so we need the possessive pronoun 'its'. The contraction 'it's' stands for 'it is' or 'it has' and does not fit grammatically in this context.
'Its' is the possessive form, whereas 'it's' is a contraction.
3
Combine the correct forms and select the matching option.
The correct phrase is 'archaeologists' primary goal was to protect its'.
This matches the option containing both the correct plural possessive and the correct possessive pronoun.

Key Concept

Distinguishing between singular and plural possessives, and between the possessive pronoun 'its' and the contraction 'it's'.
Question 70Question →

In 1799, French soldiers in Egypt discovered the Rosetta Stone near the town of Rashid. The linguist who studied the inscriptions, a collection of ancient Egyptian hieroglyphs worked for months to decipher them. Finally, in 1822, Jean-François Champollion decoded the text and unlocked the secrets of ancient Egyptian writing.

Which of the following options represents the correct punctuation for the underlined portion of the sentence?

Show answer & explanation

Answer: who studied the inscriptions, a collection of ancient Egyptian hieroglyphs,

Answer

The correct option is the one that adds a closing comma after the phrase 'a collection of ancient Egyptian hieroglyphs' while keeping the restrictive clause 'who studied the inscriptions' connected to 'The linguist' without an intervening comma.
The correct option correctly leaves the restrictive clause 'who studied the inscriptions' unpunctuated and inserts a closing comma after the nonessential appositive 'a collection of ancient Egyptian hieroglyphs' to balance the opening comma.

Step-by-Step Solution

1
Determine if the clause 'who studied the inscriptions' is restrictive or nonrestrictive.
The clause is restrictive because it identifies which specific linguist is being discussed. Therefore, it should not be set off by a comma from the noun 'linguist'.
Restrictive clauses are essential to the meaning of the sentence and do not take commas.
2
Determine if the phrase 'a collection of ancient Egyptian hieroglyphs' is essential or nonessential.
The phrase is a nonessential appositive that adds extra information about 'the inscriptions'. It must be set off by a pair of commas.
Nonessential appositives require surrounding commas to separate them from the rest of the sentence.
3
Check the punctuation before and after the appositive phrase.
There is already an opening comma after 'inscriptions'. A closing comma is required after 'hieroglyphs' before the verb 'worked' to balance the punctuation.
Parenthetical elements must have matching punctuation at both the beginning and the end.

Key Concept

Commas with nonessential appositives and restrictive relative clauses.
Question 71Question →

The committee faced numerous setbacks while revising the organization's charter. The document that the committee drafted after weeks of intense debate, which outlined the new bylaws was finally approved by the board of directors. This decision marked the beginning of a new era of governance for the institution.

Which of the following options represents the correct punctuation for the underlined portion?

Show answer & explanation

Answer: that the committee drafted after weeks of intense debate, which outlined the new bylaws, was

Answer

The correct option is the one that leaves the restrictive clause without commas and sets off the nonessential relative clause with a pair of commas.
The correct option properly integrates the restrictive clause 'that the committee drafted after weeks of intense debate' without any commas, and correctly encloses the nonessential relative clause 'which outlined the new bylaws' in a pair of commas, placing one before 'which' and one after 'bylaws'.

Step-by-Step Solution

1
Analyze the syntactic roles of the clauses modifying the noun 'document'.
The clause 'that the committee drafted after weeks of intense debate' is essential (restrictive) because it specifies which document was approved. The clause 'which outlined the new bylaws' is nonessential (nonrestrictive) because it merely adds descriptive detail about the document's contents.
Identifying the clause types dictates their punctuation: restrictive clauses must not have commas, whereas nonrestrictive clauses must be set off by commas.
2
Evaluate the punctuation needed around each clause.
No commas should precede or follow 'that the committee drafted after weeks of intense debate'. However, a pair of commas must enclose the nonessential clause 'which outlined the new bylaws' (one comma before 'which' and one after 'bylaws').
A pair of parenthetical commas must be used to enclose a nonessential element in the middle of a sentence, without interrupting the flow of essential modifiers.

Key Concept

Distinguishing between restrictive (essential) and nonrestrictive (nonessential) relative clauses to apply correct comma punctuation.
Estimated Time:1m 0s
Question 72Question →

In the passage below, a portion of the sentence is underlined. Which of the following options correctly punctuates the underlined portion?

Marine biologists have long studied the defensive mechanisms of the mimic octopus, they have found that this remarkable creature can dynamically alter its shape, color, and texture to imitate predatory fish.

Show answer & explanation

Answer: octopus; they have found that this

Answer

octopus; they have found that this
The option using a semicolon is correct because it properly separates two closely related independent clauses without the addition of unnecessary conjunctions or creating fragments.

Step-by-Step Solution

1
Analyze the grammatical structure of the clauses on either side of the underlined punctuation.
The clause preceding the punctuation ('Marine biologists have long studied the defensive mechanisms of the mimic octopus') is an independent clause because it contains a subject and a verb and can stand alone as a sentence. The clause following the punctuation ('they have found that this remarkable creature can dynamically alter its shape, color, and texture to imitate predatory fish') is also an independent clause.
Determining clause independence is the crucial first step to deciding whether a comma, semicolon, or other punctuation is required.
2
Evaluate the grammar rules for connecting two independent clauses.
Two independent clauses must be joined using a semicolon or a comma paired with a coordinating conjunction (such as 'and', 'but', or 'so'). They cannot be joined by a comma alone, nor can they be separated by a semicolon if one is converted into a dependent clause.
This step allows us to eliminate grammatically incorrect options.

Key Concept

Semicolons are used to link two independent clauses that are closely related in thought.
Question 73Question →

Discovered in a shipwreck off the coast of a Greek island, the Antikythera mechanism has astonished historians of science; indeed, its complex gear systems suggest that ancient Greeks had achieved a level of technological sophistication previously thought impossible until the modern era.

Which choice represents the correct punctuation and phrasing for the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

The correct option is the original phrasing, which uses a semicolon and the conjunctive adverb 'indeed' followed by a comma and the possessive pronoun 'its'.
The correct option correctly uses a semicolon to separate two independent clauses linked by the conjunctive adverb 'indeed'. It also correctly uses the possessive pronoun 'its' rather than the contraction 'it's'.

Step-by-Step Solution

1
Analyze the structure of the clauses surrounding the underlined portion.
The first clause ('Discovered in a shipwreck... historians of science') is independent. The second clause ('its complex gear systems suggest... modern era') is also independent.
To determine whether a semicolon is appropriate, we must verify that it separates two independent clauses that could stand alone as sentences.
2
Evaluate the joining punctuation and transitions.
A semicolon is required to join these two independent clauses when a conjunctive adverb like 'indeed' is used. The conjunctive adverb must be followed by a comma.
Joining two independent clauses with a comma and a conjunctive adverb without a semicolon creates a comma splice.
3
Check the spelling and usage of the possessive pronoun.
The possessive pronoun 'its' is required to modify 'complex gear systems'. The contraction 'it's' would translate to 'it is complex gear systems', which is incorrect.
This step eliminates choices that confuse the possessive pronoun with the contraction.

Key Concept

Semicolons are used to link two independent clauses, especially when the second clause begins with a conjunctive adverb or transitional phrase.
Estimated Time:1m 0s
Question 74Question →

In 1967, postgraduate student Jocelyn Bell Burnell detected a series of anomalous, highly regular radio signals. Her supervisor initially dismissed the pulses as man-made interference. However, Burnell, who kept analyzing the data meticulously, soon realized that the signals that she recorded were originating from a rapidly spinning neutron star.

Which choice most effectively punctuates the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

NO CHANGE
The correct answer maintains the proper punctuation for both clauses. The nonessential clause 'who kept analyzing the data meticulously' is correctly set off with a matched pair of commas, and the restrictive clause 'that she recorded' is correctly left without commas.

Step-by-Step Solution

1
Identify the nonessential elements and restrictive clauses in the underlined portion.
The clause 'who kept analyzing the data meticulously' is a nonessential relative clause modifying 'Burnell', while 'that she recorded' is a restrictive relative clause modifying 'signals'.
Relative clauses modifying proper nouns are nonessential because the referent is already unique. Relative clauses beginning with 'that' are restrictive.
2
Evaluate the choices based on standard punctuation rules for nonessential and restrictive elements.
A pair of commas must enclose 'who kept analyzing the data meticulously', whereas no commas should surround 'that she recorded'.
Nonessential elements must be fully set off with commas (parenthetical pair), and restrictive elements must never be separated from their referent with commas.

Key Concept

Commas with Nonessential and Parenthetical Elements
Question 75Question →

Although the two local businesses shared a downtown office building, each company's employees were proud of its modern workspace.

Which of the following is the correct form of the underlined portion?

Show answer & explanation

Answer: company's employees were proud of its

Answer

company's employees were proud of its
The noun modified by the word 'each' must be singular, so the singular possessive form 'company's' is correct. The pronoun referring back to 'each company' must be the possessive pronoun 'its' (without an apostrophe). The contraction 'it's' (meaning 'it is') is incorrect in this context.

Step-by-Step Solution

1
Determine whether the noun following 'each' should be singular or plural.
The word 'each' requires a singular noun, so we must use 'company' instead of 'companies'.
Correct grammatical agreement with the modifier 'each'.
2
Determine the correct possessive form for the singular noun 'company'.
The singular possessive form is 'company's'.
To show ownership by a single company.
3
Determine whether to use the possessive pronoun 'its' or the contraction 'it's'.
The context requires the possessive pronoun 'its' to refer to the company's workspace.
'it's' is a contraction for 'it is', which does not make sense in the phrase 'it is modern workspace'.

Key Concept

Distinguishing between singular and plural possessives, and between the possessive pronoun 'its' and the contraction 'it's'.
Estimated Time:45s
Question 76Question →

Because the three municipal clinics shared a digital archival system, the clinic's administrators were able to retrieve patient histories without compromising they're privacy.

Which choice represents the correct punctuation and word choice for the underlined portion of the sentence?

Show answer & explanation

Answer: clinics' administrators were able to retrieve patient histories without compromising their

Answer

The choice containing 'clinics' administrators were able to retrieve patient histories without compromising their' is correct because it correctly uses the plural possessive noun 'clinics'' and the possessive pronoun 'their'.
The correct choice uses the plural possessive noun 'clinics'' because the introductory phrase establishes that there are multiple clinics ('three municipal clinics'). It also correctly uses the possessive pronoun 'their' to indicate the privacy belonging to the patients.

Step-by-Step Solution

1
Determine if the noun 'clinic' should be singular or plural, and possessive or not.
The sentence refers to 'three municipal clinics', which means multiple clinics are involved. The administrators belong to these clinics, so we need the plural possessive form, which is 'clinics'.
Plural nouns ending in 's' form their possessive by adding an apostrophe after the 's'.
2
Determine if the pronoun modifying 'privacy' should be a possessive pronoun or a contraction.
The context requires a possessive pronoun to show that the privacy belongs to the patients. The possessive pronoun is 'their', not the contraction 'they're' (which stands for 'they are').
Substituting 'they are' into the sentence ('without compromising they are privacy') is grammatically incorrect.
3
Combine these findings to select the correct choice.
The correct option must contain both 'clinics'' and 'their'.
Only this combination satisfies both grammatical requirements.

Key Concept

Apostrophes for Possessives and Contractions
Question 77Question →

The following sentence contains two independent clauses. Enter the correct punctuation mark (such as a comma, semicolon, or colon) that should fill the blank to properly join the clauses within a single sentence.

Fill in the blanks below

Bioluminescent fungi glow in the dark to attract nocturnal insects consequently, these insects help disperse the fungi's spores throughout the forest.
Show answer & explanation

Answer

A semicolon (;) is the correct punctuation mark to join the two independent clauses.
A semicolon is correct because it properly connects two independent clauses that are joined by the transitional adverb 'consequently' within a single sentence.

Step-by-Step Solution

1
Identify the grammatical structure of the clauses on both sides of the blank.
The clause before the blank ('Bioluminescent fungi glow in the dark to attract nocturnal insects') and the clause after the blank ('these insects help disperse the fungi's spores throughout the forest') are both independent clauses because they can stand alone as complete thoughts.
Determining whether the clauses are independent or dependent dictates which punctuation mark is grammatically correct.
2
Determine the appropriate punctuation to connect the clauses when a transitional adverb ('consequently') is present.
Since the two independent clauses are joined by a transitional adverb, they must be separated by a semicolon.
Using a comma here would result in a comma splice, and leaving it unpunctuated would result in a run-on sentence.

Key Concept

Using semicolons to join independent clauses linked by transitional adverbs.
Estimated Time:1m 0s
Question 78Question →

The following sentence is missing punctuation between two clauses. What punctuation mark should be used to correctly join these clauses?

Fill in the blanks below

The chemist carefully calibrated the scale she needed the measurements to be extremely precise.
Show answer & explanation

Answer

A semicolon (;)
A semicolon is the correct punctuation mark to join two independent clauses that are closely related in thought, especially when no coordinating conjunction is used.

Step-by-Step Solution

1
Identify the grammatical structure of the clauses on either side of the blank.
Both 'The chemist carefully calibrated the scale' and 'she needed the measurements to be extremely precise' are independent clauses because they can each stand alone as a complete sentence.
To determine the relationship between the clauses and what punctuation is appropriate to link them.
2
Select the correct punctuation mark to join two independent clauses without a coordinating conjunction.
A semicolon must be used to link two closely related independent clauses when no coordinating conjunction (such as 'and', 'but', or 'so') is present.
To avoid grammatical errors like comma splices or run-on sentences.

Key Concept

Using semicolons to link independent clauses
Question 79Question →

Ancient scholars traveled from all over the Mediterranean to study at the Library of Alexandria. The institution , which housed thousands of papyrus scrolls containing the knowledge of the ancient world, served as the intellectual center of the Hellenistic civilization. Its destruction remains one of the greatest losses in cultural history.

Which choice best punctuates the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

The correct option is 'NO CHANGE', which properly encloses the nonessential relative clause in a pair of commas.
The underlined clause provides nonessential descriptive information about the institution. Nonessential elements must be set off from the rest of the sentence with a pair of commas. The option containing 'NO CHANGE' correctly uses a comma at both the beginning and the end of this parenthetical clause.

Step-by-Step Solution

1
Identify the role of the underlined clause in the sentence.
The clause 'which housed thousands of papyrus scrolls containing the knowledge of the ancient world' describes the 'institution' but is not essential to identify it or complete the main thought of the sentence.
Determining whether a clause is essential (restrictive) or nonessential (nonrestrictive) dictates the punctuation needed.
2
Apply the punctuation rules for nonessential elements.
Nonessential elements must be set off with a pair of commas (one at the start and one at the end of the clause).
Enclosing nonessential information in commas alerts the reader that the information can be removed without altering the sentence's core meaning.

Key Concept

Commas with Nonessential and Parenthetical Elements
Question 80Question →

Although the two software companies share a database, each company's developers must update its interface independently.

Which of the following choices best replaces the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

NO CHANGE
The sentence is grammatically correct as written. The singular determiner 'each' requires a singular noun, so the singular possessive form 'company's' is correct. The possessive pronoun 'its' is correctly used to show ownership of the interface, while the contraction 'it's' (meaning 'it is') would be incorrect.

Step-by-Step Solution

1
Analyze the determiner 'each' to determine whether the modified noun should be singular or plural.
The word 'each' is a singular determiner, meaning it must modify the singular noun 'company' (possessive 'company's') rather than the plural 'companies' (possessive 'companies'').
Correct modifier-noun agreement is required for grammatical correctness.
2
Determine whether the possessive pronoun 'its' or the contraction 'it's' is appropriate to modify 'interface'.
The sentence requires a possessive pronoun to show ownership of the interface, which is 'its'. The contraction 'it's' stands for 'it is' or 'it has' and does not fit the context.
Distinguishing between possessives and contractions prevents homophone confusion.
3
Identify the option that correctly combines the singular possessive 'company's' and the possessive pronoun 'its'.
The option containing 'company's developers must update its' is the correct choice, which corresponds to the original underlined text.
Selecting the option that resolves all grammatical issues yields the correct answer.

Key Concept

Apostrophes for Possessives and Contractions
Estimated Time:45s
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