The major producers in marine and freshwater ecosystems
Correct answer: C. Diatoms
- A. The euglenoids
- B. Dinoflagellates
- C. Diatoms
- D. Red algae
Explanation
Diatoms are single-celled algae with silica cell walls, and they are the most prolific producers in aquatic environments. They perform a significant amount of the oxygen-producing photosynthesis on Earth. In contrast, while euglenoids and dinoflagellates contribute to aquatic ecosystems, they do not match the abundance or ecological impact of diatoms. Red algae are more specialized and less prevalent in terms of primary production compared to diatoms.
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About Kingdom Protista
Kingdom Protista contains mainly unicellular eukaryotes, although some forms are colonial or multicellular, with varied nutritional and reproductive methods. Questions examine protozoans, algae and examples such as Amoeba, Paramecium and Euglena, while distinguishing protists from prokaryotes, fungi and true plants.
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