Answer: Chitin.
- A Cellulose
- B Pectin
- C Lignin
- D Chitin
Correct answer: D. Chitin
Explanation: Fungal cell walls are made of chitin, a polysaccharide of N-acetylglucosamine. This distinguishes fungi from plants (cellulose) and bacteria (peptidoglycan).
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.