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| Section | Objectives |
|---|---|
| Topic 1: Science | - Basic Chemistry
|
| Topic 2: Mathematics | - Word Problems
|
| Topic 3: Verbal Skills | - Reading Comprehension
|
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NEW QUESTION # 29
Reading Comprehension
Passage:
Hand hygiene is one of the most effective ways to prevent the spread of infection. Washing hands with soap and water removes many harmful microorganisms. When soap and water are not available, alcohol-based hand sanitizers can reduce the number of germs, though they are not effective against all pathogens.
Which statement is best supported by the passage?
Answer: C
Explanation:
The passage emphasizes the importance of hand hygiene in preventing infection. It clearly states that washing hands with soap and water removes harmful microorganisms and that sanitizers can reduce germs when soap is unavailable. This supports the conclusion that handwashing helps reduce the spread of infection. Option C directly reflects this main idea. Option A is incorrect because the passage notes that sanitizers are not effective against all pathogens. Option B contradicts the passage, which presents soap and water as the most effective method. Option D is false because the passage acknowledges that germs can exist on hands. On the NEX exam, supported-detail questions require selecting an answer that accurately restates information from the passage without exaggeration or contradiction.
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NEW QUESTION # 30
Review the table of undisturbed sedimentary rock strata below.
According to the table, which of these fossils is the oldest?
Answer: B
Explanation:
This question tests understanding of the law of superposition, a fundamental principle in geology that is frequently tested on the NEX Science exam. The law of superposition states that in undisturbed sedimentary rock layers, the oldest layers are found at the bottom, while the youngest layers are found at the top. In the table shown, the soil surface is at the top, followed by Fossil D, Fossil C, Fossil B, and Fossil A at the bottom.
Because Fossil A is located in the lowest rock layer, it must be the oldest fossil. Fossils found in higher layers were deposited more recently. The key word in the question is "undisturbed," which means the layers have not been mixed or overturned by geological processes. The NEX exam often emphasizes recognizing this clue to correctly apply the law of superposition. Therefore, Fossil A is the correct answer because it represents the earliest life form preserved in the rock strata.
NEW QUESTION # 31
The mean and standard deviation (SD) of the heights (in centimeters) of four groups of teenage boys are shown below:
Based on this information, which group has the least variability in height?
Answer: A
Explanation:
This question tests understanding of standard deviation as a measure of variability. The group with thesmallest standard deviation has the least variability. Comparing the values, Group 3 has the smallest SD at 6.9.
Therefore, option D is correct. The mean does not affect variability; only the SD matters in this comparison.
The NEX often includes questions where students must interpret statistical summaries rather than perform calculations. Remember that lower SD values indicate data points are more closely clustered around the mean.
NEW QUESTION # 32
Reading Comprehension
Passage:
Vaccinations work by stimulating the immune system to recognize and fight specific pathogens. Once vaccinated, the body can respond more quickly if exposed to the disease in the future, often preventing illness entirely.
Which statement best explains how vaccines protect the body?
Answer: A
Explanation:
The passage explains that vaccines stimulate the immune system so it can recognize pathogens and respond more quickly in the future. This means vaccines act as a training mechanism for the immune system. Option C correctly reflects this explanation. Option A is incorrect because vaccines do not eliminate all bacteria permanently. Option B is the opposite of what the passage states, as vaccines strengthen immune response.
Option D is incorrect because vaccines are preventive, not treatments administered after symptoms appear.
NEX reading comprehension questions often test understanding of scientific processes explained in simple language, and correct answers usually restate information using different wording rather than introducing new ideas.
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NEW QUESTION # 33
The table below shows the average daily requirements of essential amino acids in the diet at various stages of human life.
Which of these amino acids is required in the greatest amount in the diet of toddlers?
Answer: C
Explanation:
This question requires interpreting data from a table, a common skill tested on the NEX Science exam.
Looking specifically at the column for toddlers, the amino acid with the highest listed requirement (measured in milligrams per kilogram of body mass per day) is leucine. Although lysine, valine, and phenylalanine with tyrosine are also required in significant amounts, leucine has the highest numerical value for toddlers. Leucine is an essential amino acid that plays a critical role in growth, tissue repair, and muscle protein synthesis, which are especially important during early childhood when rapid growth occurs. Because toddlers are in a phase of accelerated development, higher amounts of certain amino acids are required compared to adults.
The key to answering this question correctly is careful comparison of the numerical values within the toddler column, not overall trends across all age groups.
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NEW QUESTION # 34
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