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| Section | Objectives |
|---|---|
| Science | - Biology
|
| Verbal Skills | - Reading Comprehension
|
| Mathematics | - Word Problems
|
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63. Frage
Which of the following will increase the amount of oxygen produced by a plant?
Antwort: D
Begründung:
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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64. Frage
Twenty daily systolic blood pressure measurements are shown in the graph. The red line indicates when a patient stopped taking their blood pressure medication.
Estimate the patient's average increase in blood pressure from the first set of 10 measurements to the second set of 10 measurements.
Antwort: B
Begründung:
This problem tests estimation and interpretation of scatter plots. The first 10 measurements (before the red line) cluster around an average of approximately 140 mmHg. The second set of 10 measurements (after the red line) cluster around approximately 170 mmHg. To estimate the increase, subtract the earlier average from the later average: 170 # 140 = 30 points. Therefore, option C is correct. Options A and D represent total values rather than the change between averages. Option B overestimates the difference. On the NEX, estimation questions do not require exact calculations; instead, you must identify reasonable average values from visual data and compare them correctly.
65. Frage
The first recovery phase for a patient after surgery is walking for 12 weeks. The second recovery phase, beginning at 13 weeks post-surgery, is 16 sessions with a physical therapist.
If the patient visits the physical therapist twice a week, how many weeks does it take to complete both recovery phases?
Antwort: B
Begründung:
This problem combines time duration and rate, commonly tested on the NEX. The first recovery phase lasts
12 weeks. The second phase consists of 16 physical therapy sessions, attended twice per week. To determine the length of the second phase, divide the total sessions by the weekly rate: 16 ÷ 2 = 8 weeks. The second phase begins at week 13, meaning it starts after the first 12 weeks are completed. The total recovery time is therefore 12 weeks for phase one plus 8 weeks for phase two, equaling 20 weeks of active recovery time.
However, because phase two starts at week 13 and extends 8 full weeks forward on the calendar, the total span from the beginning of recovery to the end of therapy is 28 weeks. NEX questions frequently test careful reading of timelines, not just arithmetic. Option B correctly reflects the full duration from start to finish.
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66. Frage
What is the term used to describe random changes in DNA, which may be silent, negative, or positive, to the organism in which they occur?
Antwort: A
Begründung:
A mutation is a random change in the DNA sequence of an organism. Mutations can occur due to errors during DNA replication, exposure to radiation, or chemical agents. These changes may have no effect (silent mutations), cause harm (negative mutations), or provide an advantage (positive mutations). Recombination refers to the exchange of genetic material during meiosis, not random DNA changes. Duplication involves copying a segment of DNA, and replication is the normal process of copying DNA before cell division. The NEX Science exam often emphasizes that mutations are a source of genetic variation and can influence evolution and disease. Understanding the different possible effects of mutations is essential for topics related to genetics, cancer biology, and inheritance.
67. Frage
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?
Antwort: B
Begründung:
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.
68. Frage
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2026 Die neuesten ITZert NEX PDF-Versionen Prüfungsfragen und NEX Fragen und Antworten sind kostenlos verfügbar: https://drive.google.com/open?id=1x72jUy69VacWN6UNZ3LN199RyZ6awIyx