Algae with holdfast, stipe and leaf-like blades
Correct answer: A. Laminaria
- A. Laminaria
- B. Volvox
- C. Polysiphonia
- D. Ulva
Explanation
The correct answer is Laminaria. Laminaria is a type of brown algae that is characterized by its holdfast, which anchors it to surfaces; a stipe, which acts like a stem; and leaf-like blades that are used for photosynthesis. These features are not present in the other options: Volvox forms colonies and lacks these structures; Polysiphonia has a different, filamentous structure; and Ulva, while having a leaf-like appearance, does not have a stipe or holdfast.
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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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