HESI A2
Biology HESI A2 Practice Exam
1. In nature, water vapor becomes liquid water through the process of ___________.
- A. condensation
- B. sublimation
- C. precipitation
- D. absorption
Correct answer: A
Rationale: In nature, water vapor becomes liquid water through the process of condensation. Condensation occurs when water vapor cools and changes its state from a gas to a liquid, forming droplets that we commonly see as water droplets on surfaces or clouds in the sky. Sublimation refers to the transition from a solid to a gas without passing through the liquid phase. Precipitation is the process where water in the atmosphere falls to the ground as rain, snow, sleet, or hail. Absorption is the process of one substance being taken in by another.
2. Which is true of gametes?
- A. They are diploid cells
- B. They are haploid cells
- C. They are somatic
- D. A & C are true
Correct answer: B
Rationale: Gametes are sex cells (sperm and eggs) that are involved in sexual reproduction. They are haploid cells, meaning they have half the number of chromosomes (n) compared to diploid cells. This is necessary for the formation of a diploid zygote when two gametes unite during fertilization. Somatic cells are non-reproductive cells in the body, so they are not gametes. Choice A is incorrect because gametes are not diploid but haploid. Choice C is incorrect because gametes are not somatic cells.
3. Choose the meaning of the word 'coterie' in the following sentence: 'Julia and her coterie are often out at local clubs until the wee hours.'
- A. A close group of friends
- B. An extended family
- C. An engaged person
- D. A manager or director
Correct answer: A
Rationale: In this context, the word 'coterie' refers to a small group of people who share similar interests or activities, typically a close-knit circle of friends. The other choices are incorrect. 'An extended family' refers to relatives beyond the nuclear family, 'an engaged person' is someone committed to be married, and 'a manager or director' are job roles unrelated to the context of the sentence.
4. What does 'deteriorating' mean?
- A. Improving
- B. Worsening
- C. Staying the same
- D. Fluctuating
Correct answer: B
Rationale: The correct answer is B, 'Worsening.' Deteriorating refers to something getting worse over time, not improving (choice A), staying the same (choice C), or fluctuating (choice D).
5. Solve for x: x/5 = 3/10.
- A. x = 0.6
- B. x = 0.6
- C. x = 0.9
- D. x = 1.5
Correct answer: D
Rationale: To solve for x when x/5 = 3/10, you need to cross-multiply. This gives you 10x = 5 × 3. Simplifying further, you get x = 15/10, which reduces to x = 1.5. Therefore, the correct answer is x = 1.5. Choices A, B, and C are incorrect because they do not match the correct calculation for x.
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