Question

In a particular food chain, if the energy produced at first trophic level is 1000 kcal, then the amount of energy which reaches fourth trophic level is _______.

• A. 100 kcal
• B. 0.01 kcal
• C. 1 kcal
• D. 0.1 cal

Answer 1

The correct option is C 1 kcal

According to the 10% law of energy, only 10% of the available energy is transmitted to the next trophic level. So, if 1000 kcal is available at producer level (T1), 100 kcal will be passed to T2, 10 kcal will be available at T3 and only 1 kcal will reach to level T4. The following image illustrates the law.