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

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons