A porcupine eats 3000 J of plant material.Of this,2000 J are indigestible and are eliminated as feces,900 J are used in cellular respiration,and 100 J are used for growth and reproduction.What is the approximate production efficiency of this animal?

Question

Quizplus · Accepted Answer

The production efficiency of an animal is the fraction of energy stored in food that is not used for respiration and is instead used for growth and reproduction. In this case, the animal uses 100 J for growth and reproduction out of the 3000 J consumed, so the production efficiency is:

(100 J / 3000 J) x 100 = 3.33%, which can be rounded to 3%. Therefore, the best choice is C.

A Porcupine Eats 3000 J of Plant Material