When a brown bear eats a salmon does the bear acquire all the energy contained in the body of the fish Why or why not?

Answer 1

When a brown bear eats a salmon it does not acquire all the energy contained in the body of the fish. This is because the bear's body is not efficient enough to obtain all of the energy from what eat eats. When the cells covert the protein of the fish into energy, it looses most of the useful energy in the process (the second law of thermodynamics proves this).