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A Porcupine Eats 3,000 J of Plant Material

Question 22

Multiple Choice

A porcupine eats 3,000 J of plant material. Of this, 2,100 J are indigestible and are eliminated as feces, 800 J are used in cellular respiration, and 100 J are used for growth and reproduction. What is the approximate production efficiency of this animal?


A) 0.03%
B) 3%
C) 11%
D) 27%
E) 33%

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