Question

which trophic level has the least available energy in kilojoules in this food web?
a phytoplankton
b herbivorous zooplankton
c baleen whale
d killer whale

Explanation:

In a food - web, energy transfer follows the 10% rule, where only about 10% of the energy is passed on from one trophic level to the next. Higher trophic levels have less available energy. Phytoplankton are primary producers (low - trophic level), herbivorous zooplankton are primary consumers, baleen whales are secondary or higher - level consumers, and killer whales are top - level predators. As the top - level predator, the killer whale is at the highest trophic level and has the least available energy.

Answer:

D. Killer whale