The energy available at the trophic level that has primary consumers is 500 kilocalories. How much of this energy is most likely transferred to the trophic level that has secondary consumers? 500 kilocalories
50 kilocalories
5 kilocalories
0 kilocalories

the answer is d (apex) good luck : ))

the relative standard reduction potential of the half-cell in which reduction occurs; more positive than the other half-cell. reduction is a chemical process in which electrons are added to an atom or an ion; it always occurs accompanied by oxidation of the reducing agent.

idk about that one.