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| Section | Weight | Objectives |
|---|---|---|
| Mathematics | 28% | - Numbers and Operations
|
| Science | 38% | - Health
|
| Verbal Ability | 34% | - Reading Comprehension
|
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NEW QUESTION # 48
You are staining bacterial samples for identification and viewing them under a microscope.
Which bacterial shape do you observe in the sample?
Answer: D
Explanation:
This question tests knowledge of bacterial morphology, which is commonly assessed on the NEX Science exam. Bacteria are often classified based on their shape, which helps in identification and diagnosis. The image shows elongated, rod-shaped bacteria. This shape is characteristic ofbacilli. Bacilli are cylindrical or rod-like and are commonly found in many bacterial species, includingEscherichia coliandBacillus anthracis.
Cocci are spherical in shape, spirochetes are long and spiral-shaped, and vibrios have a curved, comma-like appearance. None of these shapes match the straight rod-like structures shown in the image. Identifying bacterial shape is an important first step in microbiology before further tests such as Gram staining or biochemical analysis are performed. The NEX exam frequently uses images or descriptions to assess whether students can correctly distinguish between cocci, bacilli, spirilla/spirochetes, and vibrios based on visual characteristics. Recognizing bacilli as rod-shaped bacteria is a key foundational concept.
NEW QUESTION # 49
What is the term for organisms that are preserved for thousands of years by being buried in sediment, encased in amber, or frozen in ice?
Answer: A
Explanation:
Fossils are the preserved remains or traces of organisms that lived in the past. Fossilization can occur in several ways, including burial in sediment, preservation in amber, or freezing in ice. These conditions prevent decay and allow organisms or parts of organisms to remain intact for thousands or even millions of years.
Fossils provide critical evidence for understanding evolution, extinct species, and changes in life on Earth over time. The terms remnants, ancestors, and relics are not scientifically precise terms used to describe preserved organisms in geology or biology. The NEX Science section often focuses on basic concepts of evolution and Earth history, making fossil identification an important topic.
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NEW QUESTION # 50
Reading Comprehension
Passage:
Clear documentation in healthcare settings ensures continuity of care. Accurate records allow providers to understand patient history and make informed decisions.
Why is documentation important according to the passage?
Answer: B
Explanation:
The passage clearly states that documentation ensures continuity of care by allowing healthcare providers to understand patient history and make informed decisions. Option B directly reflects this purpose. The passage does not claim that documentation replaces care, eliminates all errors, or reduces workload. NEX passages often emphasize communication and record-keeping as foundational healthcare skills, making continuity of care a key concept.
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NEW QUESTION # 51
At a certain hospital, onlyof all births are twins. What percent is that?
Answer: B
Explanation:
This problem requires converting a fraction into a percent, a frequent NEX skill. Begin by convertinginto a decimal. Divide 1 by 25:
1 ÷ 25 = 0.04.
Next, convert the decimal to a percent by multiplying by 100:
0.04 × 100 = 4%.
Thus, the correct answer is B. Option A (0.4%) results from moving the decimal only one place instead of two. Option C (1.25%) corresponds to, and option D (25%) equals. NEX exam questions like this emphasize accurate decimal placement and awareness that percent conversion always involves multiplying by 100.
NEW QUESTION # 52
Review the table of undisturbed sedimentary rock strata below.
According to the table, which of these fossils is the oldest?
Answer: D
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 # 53
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