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Which one of the following is a primary consumer in maize field ecosystem?
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- Lion
- Grasshopper
- Wolf
- Phytoplankton
Correct Option: B
In an ecosystem, producers (e.g., plants/ phytoplankton) belong to first trophic level, herbivores or primary consumer (e.g., grasshopper) to the second and carnivores or secondary consumer (e.g., lion, wolf) to the third trophic level.