Question

if producers contain 20,000 j of energy, approximately how much is passed to secondary consumers? 2,000 j 200 j 20 j 2000 j

Explanation:

Step1: Recall energy - transfer rule

In an ecosystem, only about 10% of the energy is passed from one trophic level to the next. Producers are at the first - trophic level, primary consumers are at the second trophic level, and secondary consumers are at the third trophic level.

Step2: Calculate energy passed to primary consumers

If producers have 20000 J of energy, the energy passed to primary consumers (second trophic level) is 20000×0.1 = 2000 J.

Step3: Calculate energy passed to secondary consumers

The energy passed from primary consumers to secondary consumers (third trophic level) is 2000×0.1=200 J.

Answer:

200 J