First slide

Energy Flow

Question

If 20 J of energy is trapped at producer level, then how much energy will be available to peacock as food in the following chain?
plant → mice → snake → peacock

Moderate

A

0.02 J
B

0.002 J
C

0.2 J
D

0.0002 J

Solution

Energy trapped at producer level, plant = 20 J
Energy trapped by mice = 20 x 10% = 2 J
Energy trapped by snake = 2 x 10% = 0.2 J
Energy trapped by peacock = 0.2 x 10% = 0.02 J
Energy available to peacock is the energy trapped by the snake. Therefore, the correct answer is 0.2 J

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