Question

Suppose there are 500 units of energy available at the producer level of the energy pyramid. Approximately how many units of energy are available to the first-level consumer? A. 5 B. 50 C. 1 D. 100

Answer 1

Answer is B. 50 (usually is 10%)

Answer 2

B. 50 units of energy are available to the first-level consumers.

TERTIARY CONSUMERS 0.5
SECONDARY CONSUMERS 5
PRIMARY CONSUMERS 50
PRODUCERS 500

Every unit of energy available at the producer level decreases on every level raised. The unit of energy goes down by 10% in every level. Thus, when the energy from producers, 500 units, goes up to the first-level consumer or primary level, it energy becomes 50.