Final answer:
To calculate the percentage of energy transferred, we use the formula for trophic level transfer efficiency (TLTE). In the given food chain, the percentage of energy transferred from the grass to the lion is 20%.
Step-by-step explanation:
To calculate the percentage of energy transferred, we need to use the formula for trophic level transfer efficiency (TLTE):
TLTE = (production at current trophic level / production at previous trophic level) x 100
In the given food chain: Grass → Elephant → Lion, let's assume that the grass has an energy production of 100 units. If the energy transferred to the elephant is 10 units, the TLTE between the grass and the elephant is (10 / 100) x 100 = 10%. Similarly, if the energy transferred to the lion is 2 units, the TLTE between the elephant and the lion is (2 / 10) x 100 = 20%.
So, the percentage of energy transferred from the grass to the lion in this food chain is 20%.