Algae with two shells that overlap made up of silica
Correct answer: B. Diatoms
- A. Dinoflagellates
- B. Diatoms
- C. Brown algae
- D. Red algae
Explanation
The correct answer is Diatoms. Diatoms are a group of algae that have a unique cell wall made of silica, forming two overlapping shells or frustules. This silica-based structure is a key characteristic that distinguishes diatoms from other types of algae. Dinoflagellates have cellulose plates, not silica shells. Brown algae are large and multicellular with no silica shells, and red algae are noted for their red pigments and also lack silica shells.
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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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