Which of the following is a group of chlorophyll-bearing, simple, thalloid, autotrophic and primarily aquatic (both freshwater and marine) organisms?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. Algae .
Algae are a diverse group of chlorophyll-bearing, simple, thalloid, autotrophic organisms that are primarily aquatic, found in both freshwater and marine environments. They perform photosynthesis to produce their own food and are crucial to aquatic ecosystems as primary producers. Algae can be unicellular (like Chlamydomonas) or multicellular (like seaweeds), and they lack true roots, stems, and leaves, which is why they are referred to as thalloid. Because of their simple structure and ability to produce oxygen, they play an essential role in maintaining the ecological balance of aquatic habitats and contribute significantly to global oxygen production.
Other Options:
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Gymnosperms: Seed-producing plants with vascular tissues, not simple thalloid.
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Bryophytes: Non-vascular land plants like mosses, usually found in moist terrestrial environments.
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Pteridophytes: Vascular plants like ferns with true roots, stems, and leaves.