Question

krill are small, shrimp - like crustaceans that travel in large swarms, eating phytoplankton and being eaten in vast quantities by a variety of fishes, penguins and other marine birds, and whales. what trophic level do krill belong to?
a. first
b. second
c. third
d. fourth

Explanation:

Trophic levels are based on feeding relationships. Phytoplankton are primary producers (first trophic level). Krill eat phytoplankton, making them primary consumers (second trophic level).

Answer:

B. second