Answer: Phaeophyceae.
- A Chlorophyceae
- B Rhodophyceae
- C Phaeophyceae
- D Cyanophyceae
Correct answer: C. Phaeophyceae
Explanation: Large brown seaweeds such as Laminaria and Sargassum, with chlorophyll a, c and fucoxanthin, are Phaeophyceae.
Plants evolved from water-dependent algae through increasingly land-adapted groups, gaining vascular tissue (Pteridophyta), then seeds (Gymnosperms), and finally fruit-enclosed seeds (Angiosperms) - each step reducing dependence on water for reproduction.
Concept context
Classification of plants from algae to angiosperms. Understanding plant diversity is essential for NEET.