Food chains and the energy flow within an ecosystem provide an important understanding of contingencies and mutual dependencies of organisms. The given below flow chart depicts the energy flow within some members of a grassland ecosystem. The grass in the below ecosystem transducer 120,000 J of sunlight and fixes it into 12,000 J of energy. It is established that 90% of the energy of one trophic level is not passed to the next trophic level. Further assume that the energy transferred from one trophic level to the next is equally shared among the different organisms at that trophic level.

In the food web depicted above, identify the most energy efficient link for tertiary consumer.

Options

A. Rabbit
B. Rat
C. Lizard
D. Grasshopper

Answer

A

Explanation

Tertiary consumer here is Eagle So for eagle the most energy efficient link is rabbit, as the rabbit is not being eaten in any other food chain.