Multiple Choice
Which of the following best describes mechanical digestion?
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39. Digestive System
Digestion
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Which of the following is acquired outside of an animal's diet?
A
Organic molecules
B
Chemical energy
C
Essential nutrients
D
All the listed responses are needs that must be supplied through diet.
E
Oxygen
Verified step by step guidance1
Understand the context of the question: It is asking which of the listed items is not obtained through an animal's diet.
Review the options: Organic molecules, chemical energy, and essential nutrients are all typically obtained through food consumption.
Consider the role of oxygen: Oxygen is a critical component for cellular respiration, but it is not acquired through diet. Instead, it is obtained from the environment, usually through breathing.
Recognize that oxygen is essential for energy production in cells, but it is not a dietary requirement.
Conclude that the correct answer is oxygen, as it is the only item in the list that is not acquired through an animal's diet.
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