Praxis 5005 Practice Question
Based on the food web shown, which of the following is true about the feeding relationships?
Correct Answer: C
Rationale: Phytoplankton serve as producers in aquatic ecosystems, utilizing sunlight to convert light energy into organic matter through photosynthesis, making option C accurate.
Option A is incorrect; bivalves, such as clams and oysters, do have natural predators, including certain fish and birds.
Option B mischaracterizes wading birds; they are primarily carnivorous and feed on small fish and invertebrates, not herbivorous.
Option D is misleading; sea ducks are primary consumers that primarily feed on aquatic plants and small invertebrates, not exclusively on bald eagles, which are apex predators.
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