Question

The average efficiency of energy transfer between trophic levels is approximately.

Answer 1

10%

Step-by-step explanation:

On average, only 10% of energy stored as biomass in a trophic level is passed from one level to the next. This is known as 10% rule.

Answer 2

10%

Step-by-step explanation:

It's the famous "10 percent rule" that limits how much energy is transferred b/w trophic levels.

So if we started with 1000 kJ of energy then on average, only 10%, which is about 100 kJ of energy is passed onto the next trophic level.