A rose bush contains 1000kJ/m²/year of energy and only 10% of this energy is passed on at each tropic level of the food chain. How much energy will be passed on to the primary consumer?

To calculate the amount of energy passed on to the primary consumer, we need to multiply the energy available at the producer level (1000 kJ/m²/year) by the efficiency of energy transfer at each trophic level (10% or 0.1).

Energy passed on to primary consumer = 1000 kJ/m²/year * 0.1 = 100 kJ/m²/year

Therefore, 100 kJ/m²/year of energy will be passed on to the primary consumer.