Question

If the energy transferred to a tertiary consumer in a food chain is 10 J, how much energy was available to the primary consumer?
(a) 100 J
(b) 500 J
(c) 1000 J
(d) 5000 J

Answer 1

(c) 1,000 J

According to the 10 per cent law, only 10 per cent of the energy available in one trophic level is transferred to the next trophic level.