Answer: Red algae.
- A Fungi
- B Green algae
- C Red algae
- D Mosses
Correct answer: C. Red algae
Explanation: Agar is a polysaccharide obtained from red algae (Rhodophyta), particularly Gelidium and Gracilaria. It is used as a solidifying agent in microbiological culture media.
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.