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Nursing Elites

ATI TEAS 7

physics

1. Which term refers to the measure of the mass of a substance per unit volume and is commonly expressed in kilograms per cubic meter?

Correct answer: c

Rationale: Density is the measure of the mass of a substance per unit volume and is commonly expressed in kilograms per cubic meter (kg/m³).

2. Hair follicles are openings in the skin that house

Correct answer: C

Rationale: Hair follicles are structures in the skin that house both the hair shaft and the hair root. The hair shaft is the visible part of the hair that extends from the skin's surface, while the hair root is the part embedded within the hair follicle and extends into the deeper layers of the skin. The sebaceous glands, which produce sebum (an oily substance), are typically attached to hair follicles and help lubricate and protect the hair and skin. Blood vessels and nerve endings are present in the skin but are not housed within the hair follicles themselves. Therefore, the correct answer is C, as hair follicles contain both the hair shaft and hair root.

3. The word "obscurity" can be replaced with which of the following without changing the meaning?

Correct answer: B

Rationale: Both "obscurity" and "seclusion" imply being hidden or unknown. Prominence, destruction, and transformation do not convey the same meaning.

4. Which type of cell has a nucleus but lacks membrane-bound organelles?

Correct answer: B

Rationale: The correct answer is B: Prokaryotic cell. Prokaryotic cells are characterized by having a nucleus, known as the nucleoid, which contains genetic material but lacks a membrane-bound organelles such as mitochondria, endoplasmic reticulum, and Golgi apparatus. Plant and animal cells (options A and C) are eukaryotic cells that have a nucleus and membrane-bound organelles. Fungal cells (option D) are also eukaryotic cells with a nucleus and organelles. Understanding the difference between prokaryotic and eukaryotic cells is essential in biology to grasp the diversity of cell structure and function.

5. Which of the following is an example of an unsaturated fatty acid?

Correct answer: C

Rationale: Oleic acid is an unsaturated fatty acid, containing at least one double bond in its hydrocarbon chain. The other choices are saturated fatty acids.

6. The fossil record shows that dinosaurs with feathers existed millions of years before birds. This is evidence for

Correct answer: A

Rationale: Rationale: The fossil record indicating that dinosaurs had feathers before birds suggests convergent evolution. Convergent evolution occurs when unrelated organisms independently evolve similar traits to adapt to similar environmental pressures. In this case, both dinosaurs and birds developed feathers for flight or insulation purposes, even though they are not closely related. This evidence supports the concept of convergent evolution rather than divergent evolution, coevolution, or the extinction of dinosaurs due to an asteroid impact.

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