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| Section | Weight | Objectives |
|---|---|---|
| Mathematics | 28% | - Measurement
|
| Verbal Ability | 34% | - Word Knowledge
|
| Science | 38% | - Health
|
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NEW QUESTION # 143
Reading Comprehension
Passage:
Medical research relies on controlled experiments to test hypotheses. By controlling variables, researchers can determine whether observed effects are due to the factor being studied.
Why are controlled experiments important?
Answer: A
Explanation:
Controlled experiments allow researchers to isolate one variable and observe its effects while keeping other factors constant. This makes it possible to determine cause-and-effect relationships. Option C correctly reflects this purpose. The other options misrepresent the role of experiments. On the NEX exam, scientific reading passages often focus on basic research principles and reasoning.
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NEW QUESTION # 144
A patient is supposed to receive 5.6 centimeters (cm) of ointment. Given that 1 inch (in) = 2.54 cm, how many inches long will the application of ointment be?
Round to the nearest tenth.
Answer: D
Explanation:
This problem tests metric-to-customary unit conversion with rounding, a common skill on the NEX exam. To convert centimeters to inches, divide the number of centimeters by 2.54. Set up the calculation: 5.6 ÷ 2.54.
Performing the division gives approximately 2.20 inches. However, reviewing the answer choices, this reveals a potential trick: the correct division actually gives 2.2 inches, which would normally match option C, but option A (1.4 in) is based on halving a common incorrect step. Rechecking carefully: 5.6 ÷ 2.54 #2.2, so option Cis the mathematically correct answer.
#Correct answer: C (2.2 in)
On the NEX exam, always trust dimensional analysis and calculator results rather than estimating too early.
Rounding should only occur after completing the conversion.
NEW QUESTION # 145
Reading Comprehension
Passage:
Regular exercise helps maintain bone density and muscle strength. Weight-bearing activities such as walking and resistance training are especially important in preventing osteoporosis as people age.
Which activity mentioned in the passage helps prevent bone loss?
Answer: B
Explanation:
The passage specifically mentions weight-bearing activities as being important for maintaining bone density and preventing osteoporosis. Walking is a weight-bearing exercise because the bones must support the body's weight during movement. Option C is therefore correct. The passage does not mention stretching, swimming, or meditation. While swimming is good for cardiovascular health, it is not weight-bearing. On the NEX exam, detail questions often require recognizing examples given directly in the passage rather than applying outside knowledge. Selecting walking demonstrates accurate reading and attention to detail.
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NEW QUESTION # 146
Review the image below.
Which is the best piece of evidence that the blue whale evolved from a mammal that once lived on land?
Answer: B
Explanation:
Vestigial structures are anatomical features that are reduced in size and function compared to their ancestral form. In whales, vestigial leg bones are remnants of hind limbs that were fully functional in land-dwelling ancestors. These bones no longer serve a locomotor purpose but provide strong evolutionary evidence of descent from terrestrial mammals. The spinal column, rib cage, and jawbones are found in many vertebrates and do not specifically indicate a land-based ancestry. Vestigial leg bones, however, directly point to a time when whales had legs and lived on land before adapting to an aquatic environment. The NEX Science exam frequently tests evolutionary evidence, especially the significance of vestigial structures as proof of common ancestry and evolutionary change over time.
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NEW QUESTION # 147
Milk, pure water, lemon juice, and gastric juice were tested using a pH meter. Results are summarized in the chart below.
Substance | pH
Milk | 6.8
Pure water | 7
Lemon juice | 2
Gastric juice | 1
Which substance is the most acidic?
Answer: D
Explanation:
The pH scale measures acidity and alkalinity, ranging from 0 to 14. Lower pH values indicate higher acidity, while higher pH values indicate greater alkalinity. A pH of 7 is considered neutral. In the chart provided, gastric juice has a pH of 1, which is the lowest value listed, making it the most acidic substance. Lemon juice, with a pH of 2, is also acidic but less so than gastric juice. Milk is slightly acidic, and pure water is neutral.
Gastric juice contains hydrochloric acid, which aids digestion and destroys harmful microorganisms in the stomach. The NEX Science exam frequently tests understanding of the pH scale and its physiological relevance, particularly in digestive processes.
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NEW QUESTION # 148
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