1.
The penguin chicks cannot go into the water to get themselves own food until they have
waterproof coats of feathers like their parents.
Correct Answer
B. B. themselves
Explanation
The correct answer is B. themselves. The sentence states that the penguin chicks cannot go into the water to get their own food until they have waterproof coats of feathers like their parents. This implies that the penguin chicks need to develop their own waterproof coats before they can venture into the water independently. Therefore, the word "themselves" refers to the penguin chicks in this context.
2.
Balloons rise into their air because they contain a gas who is less dense, or lighter, than
air.
Correct Answer
C. C. who less dense
Explanation
The correct answer is C. "who less dense". This is the correct answer because the sentence is referring to the gas inside the balloons, which is less dense than air. The word "who" is used here to refer to the gas as if it were a person, which is grammatically incorrect. The correct word to use in this context would be "which", as it refers to an object or thing.
3.
The narwhal is the only animal in the world that has a tusk on only one side of it body.
Correct Answer
D. D. of it body
Explanation
The correct answer is D. of its body. This option correctly identifies the part of the narwhal's body where the tusk is located. The statement mentions that the narwhal has a tusk on only one side, indicating that it is not symmetrical like other animals. Therefore, "of its body" accurately describes the location of the tusk on the narwhal.
4.
Silver is too soft to use by itself, so it is mixed with another metal to make themselves
harder.
Correct Answer
D. D. make themselves
Explanation
The explanation for the given correct answer is that silver is too soft to be used on its own, so it needs to be mixed with another metal in order to make itself harder. This implies that silver cannot harden itself without the addition of another metal.
5.
Most slugs and snail breath using a lung which opens through a small hole in the side of
it bodies.
Correct Answer
D. D. it bodies
Explanation
The correct answer is D. it bodies. The sentence is discussing how slugs and snails breathe using a lung that opens through a small hole in the side of their bodies. The pronoun "it" is used to refer to the bodies of the slugs and snails.
6.
Every fuel has their own particular temperature at which it begins to burn.
Correct Answer
A. A. has their
Explanation
The correct answer is "A. has their." This is because the subject "Every fuel" is singular, so the pronoun "their" should be replaced with "its" to maintain subject-verb agreement. The correct sentence would be "Every fuel has its own particular temperature at which it begins to burn."
7.
Harriet Tubman, she an escaped slave, led more than three hundred slaves to freedom on
the Underground Railroad.
Correct Answer
A. A. she an escape slave
Explanation
The correct answer is A. "she an escape slave." This answer is correct because it accurately identifies the correct form of the pronoun "she" as "an escape slave." The phrase "she an escape slave" indicates that Harriet Tubman was an escaped slave, which is true according to the information given in the sentence.
8.
Dreaming, like all other mental processes, it is a product of the brain and its activity.
Correct Answer
B. B. it is
Explanation
The correct answer is B. "it is". This answer choice correctly identifies the subject of the sentence, "Dreaming", and the verb that describes it, "is". It also maintains the parallel structure of the sentence, as the other answer choices do not fit grammatically.
9.
-
- Snails produce a colorless, sticky discharge that forms a protective carpet under them as
their travel along.
Correct Answer
D. D. their travel along
Explanation
The correct answer is D. "their travel along". This is the only option that correctly identifies the possessive pronoun "their" and the verb phrase "travel along" as the subject of the sentence. The other options do not accurately describe the relationship between the snails and the action of producing a sticky discharge.
10.
George Washington Carver won international fame for his agricultural research,
who involved extensive work with peanuts.
Correct Answer
C. C. who wanted
11.
Enzymes enable the smallest virus to enter cells in order to reproduce themselves.
Correct Answer
D. D. reproduce themselves
Explanation
Enzymes play a crucial role in facilitating the entry of the smallest virus into cells. This entry is necessary for the virus to reproduce itself. The enzymes assist in breaking down barriers and allowing the virus to enter the cells, where it can then utilize the cellular machinery to replicate and produce more viruses. Therefore, option D, "reproduce themselves," correctly identifies the purpose of the virus's entry into cells facilitated by enzymes.
12.
Jack London, whom was known for his stories of Alaska, lived there during the Klondike
gold rush.
Correct Answer
A. A. whom was known
Explanation
The correct answer is A. "whom was known". This is because the correct pronoun to use in this sentence is "who" instead of "whom". "Who" is used as the subject of a verb, while "whom" is used as the object of a verb or preposition. Therefore, the correct phrasing should be "who was known for his stories of Alaska".