A group of students performed an experiment to test terminal velocity, which is the greatest speed obtained by a falling object.

The students dropped different numbers of coffee filters and measured the resulting terminal velocity.

Which of the following conclusions is supported by the data in the following data table?

#OF FILTERS

MASS (g)

TERMINAL VELOCITY (m/s)

1

1.01

1.74

2

1.99

2.48

3

3.02

3.04

4

4.0

3.50

5

5.01

3.80

Terminal velocity is when the force of gravity is equal to air resistance.

Heavier objects take more time to reach terminal velocity.

Heavier objects fall faster than lighter objects.

The greater the number of filters, the smaller the terminal velocity.

Answer and Explanation

The Correct Answer is C

The data in the table shows that as the number of filters (and therefore the mass) increases, the terminal velocity also increases.

This means that the heavier objects (with more filters) are falling faster than the lighter objects (with fewer filters).

Choice A is not supported by the data in the table.

Terminal velocity is indeed when the force of gravity is equal to air resistance, but this definition does not provide any information about the relationship between mass and terminal velocity.

Choice B is also not supported by the data in the table.

The data does not provide any information about the time it takes for an object to reach terminal velocity.

Choice D is not supported by the data in the table.

The data shows that as the number of filters increases, the terminal velocity also increases.

This means that the greater the number of filters, the greater (not smaller) the terminal velocity.

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Correct Answer is D

Explanation

The cytoskeleton of a cell is comprised of protein fibres that provide structural support and help maintain the shape of the cell.

These protein fibres include microfilaments, intermediate filaments, and microtubules.

Choice A. Carbohydrates is not the correct answer because carbohydrates are a type of macromolecule that provides energy to cells and are not a component of the cytoskeleton.

Choice B. Nucleic acids is not the correct answer because nucleic acids are macromolecules that store and transmit genetic information and are not a component of the cytoskeleton.

Choice C. Lipids is not the correct answer because lipids are a type of macromolecule that makes up cell membranes and are not a component of the cytoskeleton.

A. The food that the person ate contained toxins that killed the bacteria that would have otherwise destroyed the body. B. The arrow wound caused blood to flow out of the body, which led the enzymes that would break down tissue to be cleared from the body. C. The body was frozen in the cold temperature of the Alps shortly after he died and remained frozen until it was found. D. The ultraviolet rays at such a high altitude caused all the body's molecules to be preserved.

Correct Answer is C

Explanation

The best reason for the prolonged preservation of the body is that it was frozen in the cold temperature of the Alps shortly after he died and remained frozen until it was found.

Freezing can preserve a body by slowing down or stopping the decomposition process.

Choice A is not correct because the food that the person ate would not have contained toxins that killed the bacteria that would have otherwise destroyed the body.

Choice B is not correct because the arrow wound would not have caused blood to flow out of the body in a way that would have cleared enzymes that break down tissue from the body.

Choice D is not correct because ultraviolet rays at high altitude would not have caused all of the body’s molecules to be preserved.

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#OF FILTERS	MASS (g)	TERMINAL VELOCITY (m/s)
1	1.01	1.74
2	1.99	2.48
3	3.02	3.04
4	4.0	3.50
5	5.01	3.80

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Naxlex Comprehensive Predictor Exams

The cytoskeleton of a cell is comprised of which of the following macromolecules?

Correct Answer is D

Explanation

Hikers who found a human body at high altitude in the Italian Alps thought the man had died recently, but tests indicated he was shot with an arrow more than 5,300 years ago. Which of the following would be the best reason for prolonged preservation of the body?

Correct Answer is C

Explanation

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