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Nursing Elites

ATI TEAS 7

Biology

1. What is the difference between DNA and RNA?

Correct answer: B

Rationale: Rationale: A) Incorrect. DNA is double-stranded, but RNA is typically single-stranded. B) Correct. DNA contains deoxyribose sugar, which lacks an oxygen atom on the 2' carbon of the sugar ring, while RNA contains ribose sugar, which has an additional hydroxyl group on the 2' carbon. C) Incorrect. RNA contains the nitrogenous base uracil, while DNA contains thymine. D) Incorrect. DNA and RNA have distinct structures and functions, so they are not identical molecules.

2. Which type of muscle tissue is found in the walls of blood vessels and helps regulate blood flow?

Correct answer: B

Rationale: The correct answer is B: Smooth muscle. Smooth muscle is found in the walls of blood vessels and plays a crucial role in regulating blood flow by contracting and relaxing to adjust the diameter of the blood vessels. Skeletal muscle (option A) is responsible for movement of the body, cardiac muscle (option C) is found in the heart and responsible for pumping blood, and striated muscle (option D) refers to both skeletal and cardiac muscle due to their striated appearance. Therefore, the specific type of muscle tissue in blood vessel walls is smooth muscle.

3. In the sentence "The house was dilapidated," what effect does the word "dilapidated" have on the reader's understanding?

Correct answer: C

Rationale: The word "dilapidated" specifically describes the house's deteriorating state.

4. A keystone species plays a critical role in an ecosystem because its removal would:

Correct answer: D

Rationale: Rationale: Keystone species are species that have a disproportionately large effect on their environment relative to their abundance. They play a critical role in maintaining the structure and function of an ecosystem. If a keystone species is removed from an ecosystem, it can disrupt the food web by causing imbalances in predator-prey relationships. This disruption can lead to cascading effects on other populations within the ecosystem, potentially causing population declines or even extinctions. Therefore, the removal of a keystone species would have significant impacts on the overall ecosystem structure, making option D the correct answer.

5. Neon (Ne). Both He and Ne belong to Group 18 (Noble Gases) due to their complete and stable outer electron shells.

Correct answer: C

Rationale: Strong nuclear force. This incredibly powerful force overcomes the repulsive electrostatic force between protons and binds the nucleus together.

6. Which property of a wave determines its loudness in sound waves?

Correct answer: a

Rationale: Amplitude in sound waves relates to the loudness or intensity of the sound.

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