Measurements show that the pH of a particular lake is 4.0. What is the hydrogen ion concentration of the lake?

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#Question id: 11960

#7. System Physiology – Animal

Mechanical digestion, the process of breaking down large chunks of food into smaller pieces, is important because smaller pieces of food ________.

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#Question id: 11961

#7. System Physiology – Animal

The large surface area in the gut directly facilitates ________.

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#Question id: 11962

#7. System Physiology – Animal

 In the digestive system, peristalsis is ________.

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#Question id: 11963

#7. System Physiology – Animal

Which of the following is generally true?

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#Question id: 11964

#7. System Physiology – Animal

 Animals cannot produce enzymes to digest cellulose, yet many termite species consume cellulose from plant material as a main part of their diet. How do termites access the nutrients contained in cellulose?

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#Question id: 11965

#7. System Physiology – Animal

Which of the following organs is correctly paired with its function?