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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Science | 36.8% | - Human Anatomy
|
| Topic 2: Mathematics | 27.6% | - Measurement
|
| Topic 3: Verbal Ability | 35.6% | - Reading Comprehension
|
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NEW QUESTION # 15
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: B
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 # 16
What stimulates gustatory (taste) cells?
Answer: B
Explanation:
Gustatory cells are sensory receptors responsible for taste and are located primarily in taste buds on the tongue. These cells are stimulated by chemical substances that are dissolved in saliva. When food dissolves in saliva, the dissolved molecules bind to receptors on gustatory cells, triggering nerve impulses that are interpreted by the brain as taste. Movement of otoliths is related to balance in the inner ear, deep pressure changes stimulate mechanoreceptors, and photons of light stimulate photoreceptors in the eye. The NEX Science exam frequently tests sensory physiology by asking students to match receptors with the correct type of stimulus. Recognizing that taste is a chemical sense dependent on substances in solution is fundamental.
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NEW QUESTION # 17
A recipe for pancakes serves 4 people and requires 1.5 cups of flour.
If the cook wants to make enough pancakes to serve 8 people, how much flour is needed?
Answer: D
Explanation:
This is a proportional reasoning problem. If 4 people require 1.5 cups of flour, then doubling the number of people to 8 means doubling the amount of flour. Multiply 1.5 by 2:
1.5 × 2 = 3 cups.
Therefore, option D is correct. Option A is the original amount, not scaled. Option B greatly overestimates the amount. Option C results from incorrect multiplication. The NEX frequently includes scaling problems related to recipes, dosages, and supplies, so identifying when to multiply or divide is essential.
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NEW QUESTION # 18
In the human male, which of these structures produces sperm cells?
Answer: D
Explanation:
Sperm cells are produced in thetestes, specifically within tightly coiled structures called seminiferous tubules.
The process of sperm production is known as spermatogenesis and requires hormones such as testosterone.
Cowper's glands and the prostate gland do not produce sperm; instead, they secrete fluids that contribute to semen and help protect and nourish sperm cells. The epididymis is responsible for sperm maturation and storage but does not produce sperm. The NEX Science exam often tests reproductive anatomy by asking students to distinguish between sperm production, maturation, and transport. Understanding the specific role of each male reproductive structure is essential. Since only the testes are responsible for the formation of sperm cells, option C is the correct answer.
NEW QUESTION # 19
Which of the following will increase the amount of oxygen produced by a plant?
Answer: C
Explanation:
Oxygen is produced during the process of photosynthesis, which occurs in the chloroplasts of plant cells.
During photosynthesis, plants use carbon dioxide, water, and light energy to produce glucose and oxygen.
Carbon dioxide is one of the key raw materials required for this process. When the availability of carbon dioxide increases, the rate of photosynthesis can also increase, assuming that light and water are not limiting factors. As photosynthesis increases, more oxygen is released as a byproduct. Decreasing carbon dioxide would slow photosynthesis and reduce oxygen production. Glucose is a product of photosynthesis, not a reactant, so changing glucose levels does not directly increase oxygen output. Therefore, increasing available carbon dioxide is the correct answer. The NEX Science exam frequently tests understanding of the inputs and outputs of photosynthesis and how environmental factors affect the process.
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NEW QUESTION # 20
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2026 Latest PassTestking NEX PDF Dumps and NEX Exam Engine Free Share: https://drive.google.com/open?id=1SvC29Gf3H5SlM9xkpQ6BD9Z1Aq-ARJB-