Answer: Non-cellular obligate intracellular parasites.
- A Prokaryotic organisms possessing a cell wall and free-living metabolism
- B Non-cellular obligate intracellular parasites
- C Unicellular eukaryotes containing a membrane-bound nucleus and organelles
- D Multicellular fungi reproducing through dispersal of haploid spores
Correct answer: B. Non-cellular obligate intracellular parasites
Explanation: Viruses are non-cellular entities (acellular) that can only replicate inside living host cells. They contain either DNA or RNA (not both) enclosed in a protein coat (capsid).
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.