Answer: Phaeophyta.
- A Chlorophyta
- B Phaeophyta
- C Rhodophyta
- D Cyanophyta
Correct answer: B. Phaeophyta
Explanation: Kelp belongs to Phaeophyta (brown algae). Brown algae contain fucoxanthin (brown pigment). They form kelp forests in cold marine waters. Kelp can grow up to 50-60 meters.
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.