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You find an unlabelled slide of a single-celled organism that has a well-defined nucleus and multiple cilia. Which group would it most likely belong to? Give reasons.
The organism belongs to Kingdom Protista. In Whittaker's five kingdom system, all single-celled organisms possessing a true, membrane-bound nucleus are placed under Protista rather than Monera, which contains prokaryotes lacking nuclei. Furthermore, the presence of multiple surface cilia for locomotRead more
The organism belongs to Kingdom Protista. In Whittaker’s five kingdom system, all single-celled organisms possessing a true, membrane-bound nucleus are placed under Protista rather than Monera, which contains prokaryotes lacking nuclei. Furthermore, the presence of multiple surface cilia for locomotion and feeding is a classic diagnostic feature of aquatic protists like Paramecium, confirming this taxonomic placement.
For more NCERT Solutions of Class 9 Science Exploration Chapter 12 Patterns in Life Diversity and Classification Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-12/
See lessHow does the diversity of organisms contribute to the balance and stability of an ecosystem?
Biodiversity creates complex, interconnected food webs that keep natural cycles balanced and resilient. Producers like plants and algae harness solar energy to synthesize food and release atmospheric oxygen. Herbivores and carnivores balance populations, while pollinators ensure plant reproduction.Read more
Biodiversity creates complex, interconnected food webs that keep natural cycles balanced and resilient. Producers like plants and algae harness solar energy to synthesize food and release atmospheric oxygen. Herbivores and carnivores balance populations, while pollinators ensure plant reproduction. Finally, decomposers like fungi and bacteria recycle dead matter into soil nutrients, ensuring continuous resource renewal and ecosystem stability.
For more NCERT Solutions of Class 9 Science Exploration Chapter 12 Patterns in Life Diversity and Classification Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-12/
See lessIf all unicellular organisms were grouped into a single kingdom, what problems would arise?
(i) Blurring cellular architecture: It would unnaturally combine prokaryotes lacking membrane-bound nuclei or organelles (Monera) with complex eukaryotic cells possessing defined nuclei (Protista). (ii) Nutritional and evolutionary conflict: Unicellular photosynthetic algae, heterotrophic protozoansRead more
(i) Blurring cellular architecture: It would unnaturally combine prokaryotes lacking membrane-bound nuclei or organelles (Monera) with complex eukaryotic cells possessing defined nuclei (Protista). (ii) Nutritional and evolutionary conflict: Unicellular photosynthetic algae, heterotrophic protozoans and saprophytic chitin-walled yeasts would share a single group despite having distinct evolutionary lineages, cell wall compositions and metabolic systems, rendering systematic biological study chaotic.
For more NCERT Solutions of Class 9 Science Exploration Chapter 12 Patterns in Life Diversity and Classification Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-12/
See lessIf you were asked to revise the five kingdom classification, would you create a separate category for viruses or keep them outside the system? Justify your answer and explain what this indicates about the evolving nature of scientific classification.
Creating a distinct acellular category or non-cellular domain for viruses is justified because they possess functional genetic material and undergo biological evolution, despite lacking cellular structure. Leaving them out entirely ignores a major form of biological entity. This ongoing debate highlRead more
Creating a distinct acellular category or non-cellular domain for viruses is justified because they possess functional genetic material and undergo biological evolution, despite lacking cellular structure. Leaving them out entirely ignores a major form of biological entity. This ongoing debate highlights that scientific classification is not fixed; rather, it evolves dynamically whenever new technological insights challenge traditional biological frameworks.
For more NCERT Solutions of Class 9 Science Exploration Chapter 12 Patterns in Life Diversity and Classification Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-12/
See lessViruses were studied in earlier classes. Why are they not placed in any of the five kingdoms? Give reasons.
Viruses are excluded from the five kingdom system because Whittaker's classification is built entirely upon cellular organization, distinguishing between prokaryotic and eukaryotic cells. Viruses are non-cellular entities consisting merely of genetic material encased within a protein coat. Lacking cRead more
Viruses are excluded from the five kingdom system because Whittaker’s classification is built entirely upon cellular organization, distinguishing between prokaryotic and eukaryotic cells. Viruses are non-cellular entities consisting merely of genetic material encased within a protein coat. Lacking cytoplasm, cell membranes and independent metabolic pathways, they remain completely inert outside host cells, showing living characteristics only after infection.
For more NCERT Solutions of Class 9 Science Exploration Chapter 12 Patterns in Life Diversity and Classification Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-12/
See less