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olganol [36]
3 years ago
10

View Available Hint(s) Which statement regarding normal microbiota of the human respiratory system is FALSE? The upper respirato

ry tract is mostly sterile. The ciliary escalator in the bronchial tubes keeps the lower respiratory tract nearly sterile. Potentially pathogenic microorganisms are present in nonsterile portions of the respiratory tract but usually do not cause disease. The trachea normally may contain a few bacteria. Provide Feedback
Biology
1 answer:
RoseWind [281]3 years ago
5 0

Answer:

the second one

Explanation:

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In all cases, except case 1 the forces are unbalanced, and therefore, the net force is different from 0.

<h3>How forces act?</h3>

In physics, forces are balanced if opposite forces have the same magnitude, for example:

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To do this, consider that forces pointing upwards and to the right are positive.

Case 1

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Case 2

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Learn more about force in: brainly.com/question/4456579

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hello,

here is your answer:

**********

Statement C is false. The blood that leaves the heart through the aorta is rich in oxygen.

**********

hope this helped,

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