Q. Which one of the following types of organisms occupy more than one trophic level in a pond ecosystem?
A) Fish
B) Zooplankton
C) Frog
D) Phytoplankton
Explanation
[Solution from source] Fish in a pond may feed on plants or algae (primary consumer) as well as on zooplankton or smaller fish (secondary or higher consumer), so they occupy several trophic levels. Phytoplankton are only producers and zooplankton are mainly primary consumers. Answer (1).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.