Class 9 Science Exploration Chapter 12 MCQs – Patterns in Life: Diversity and Classification – practice helps you master – Diversity and Classification – one of the most scoring biology chapters. It explains biodiversity, endemic species and India’s biodiversity hotspots, then follows how classification developed from Aristotle to Whittaker’s five kingdom system. You will revise the features of Monera, Protista, Fungi, Plantae and Animalia, the five plant groups from Thallophyta to Angiosperms, the invertebrate phyla and the vertebrates. The chapter also covers the classification hierarchy, binomial nomenclature, fossils and threats to biodiversity.
Class 9 Science Exploration Chapter 12 MCQs with Answers
Class 9 Science Chapter 12 MCQs Set 1
Q1. What is biodiversity?
[A]. The total amount of rainfall
[B]. Only the size of forests
[C]. The variety of living organisms
[D]. Only the number of humans in an area
Q2. Which species is called endemic to a region?
[A]. One that lives only in zoos
[B]. One naturally restricted to that region
[C]. One found naturally everywhere
[D]. One introduced to every continent
Q3. Which combination characterises a biodiversity hotspot?
[A]. Very few species and no habitat loss
[B]. Only cultivated plants and low rainfall
[C]. Many endemic species and substantial habitat loss
[D]. No endemic species and abundant cities
Q4. Why is biological classification useful?
[A]. It removes all differences between organisms
[B]. It proves that all organisms are identical
[C]. It gives every organism an unrelated local name
[D]. It organises diversity and helps reveal relationships
Q5. Which feature most directly distinguishes a prokaryotic cell from a eukaryotic cell?
[A]. Its habitat alone
[B]. Its colour
[C]. Its ability to move
[D]. Absence of a membrane-bound nucleus
Class 9 Science Chapter 12 MCQs Set 2
Q6. Which set lists the five kingdoms in Whittaker’s system?
[A]. Algae, Mosses, Ferns, Pines, Roses
[B]. Monera, Protista, Fungi, Plantae, Animalia
[C]. Bacteria, Archaea, Eukarya, Fungi, Animalia
[D]. Fish, Amphibians, Reptiles, Birds, Mammals
Q7. In the five-kingdom system, bacteria belong to which kingdom?
[A]. Plantae
[B]. Monera
[C]. Animalia
[D]. Protista
Q8. A single-celled organism has a true nucleus and cilia and resembles Paramecium. Which kingdom best fits it?
[A]. Plantae
[B]. Animalia
[C]. Protista
[D]. Monera
Q9. Which combination best describes most fungi?
[A]. Without cell walls and always mobile
[B]. Eukaryotic, heterotrophic and with chitin-containing cell walls
[C]. Autotrophic with cellulose walls only
[D]. Prokaryotic and photosynthetic
Q10. Why is yeast classified as a fungus even though it is unicellular?
[A]. It has no nucleus
[B]. Its fungal characteristics include a chitin-containing cell wall and heterotrophic nutrition
[C]. It is a flowering plant
[D]. It possesses a backbone
Class 9 Science Chapter 12 MCQs Set 3
Q11. What important ecological role do many fungi perform?
[A]. Removing all minerals permanently
[B]. Preventing all decay
[C]. Decomposing organic matter and recycling nutrients
[D]. Producing every animal’s food directly
Q12. Which substance primarily forms plant cell walls?
[A]. Chitin
[B]. Starch alone
[C]. Cellulose
[D]. Calcium carbonate
Q13. Which feature is characteristic of a thallus such as that of Spirogyra?
[A]. Feathers and wings
[B]. A backbone
[C]. Seeds enclosed in fruit
[D]. A body not differentiated into true roots, stems and leaves
Q14. Why are bryophytes called the amphibians of the plant kingdom?
[A]. They possess gills and lungs
[B]. They are animals with green skin
[C]. They produce flowers underwater
[D]. They live on moist land but need water for reproduction
Q15. Which feature distinguishes ferns from bryophytes?
[A]. Vascular tissues for transporting water and food
[B]. Absence of all living cells
[C]. Absence of roots in every case
[D]. Production of fruits
Class 9 Science Chapter 12 MCQs Set 4
Q16. Which statement describes gymnosperm seeds?
[A]. They are not enclosed in fruits
[B]. They never contain embryos
[C]. They occur only inside flowers
[D]. They are always inside fleshy fruits
Q17. What distinguishes angiosperms from gymnosperms?
[A]. The absence of seeds
[B]. The absence of vascular tissues
[C]. Flowers and seeds enclosed within fruits
[D]. Reproduction only by spores
Q18. Which pair forms the association called a lichen?
[A]. A fungus and a photosynthetic alga
[B]. A bird and a mammal
[C]. A fern and a pine
[D]. An earthworm and an insect
Q19. Which feature identifies a sponge as a member of Porifera?
[A]. Feathers
[B]. Numerous pores through which water flows
[C]. A vertebral column
[D]. A jointed external skeleton
Q20. How does Hydra commonly capture prey?
[A]. Using a backbone
[B]. Using feathers
[C]. Using roots
[D]. Using tentacles
Class 9 Science Chapter 12 MCQs Set 5
Q21. Which feature of roundworms provides a one-way path through the digestive tract?
[A]. No opening at all
[B]. A single opening used for every purpose
[C]. A leaf-like surface
[D]. Separate mouth and anus
Q22. Which feature characterises annelids such as earthworms?
[A]. A single-celled body
[B]. A body divided into repeated segments
[C]. A rigid shell enclosing every segment
[D]. A body covered in feathers
Q23. A beetle has jointed appendages and a hard external skeleton. Which group does it belong to?
[A]. Arthropoda
[B]. Mollusca
[C]. Porifera
[D]. Annelida
Q24. Which description best fits molluscs such as snails and octopuses?
[A]. Animals with feathers
[B]. Plants with naked seeds
[C]. Soft-bodied animals with organ systems
[D]. Unicellular organisms without nuclei
Q25. A marine animal has spiny skin and a calcium-carbonate internal skeleton but no notochord. Which group best fits it?
[A]. Echinodermata
[B]. Monera
[C]. Arthropoda
[D]. Bryophyta
Class 9 Science Chapter 12 MCQs Set 6
Q26. Which feature is present in chordates at least during some stage of life?
[A]. A notochord
[B]. A flower
[C]. A thallus
[D]. A chitin cell wall
Q27. Which sequence correctly proceeds from a broader to a more specific classification level?
[A]. Kingdom → Phylum → Class → Order → Family → Genus → Species
[B]. Species → Genus → Family → Kingdom
[C]. Genus → Class → Order → Phylum
[D]. Family → Kingdom → Class → Genus
Q28. Which option correctly capitalises the tiger’s scientific name?
[A]. PANTHERA TIGRIS
[B]. panthera Tigris
[C]. panthera tigris
[D]. Panthera tigris
Q29. Why can fossils help scientists understand biodiversity?
[A]. They record only present-day weather
[B]. They preserve evidence of organisms that lived in the past
[C]. They prevent species from changing
[D]. They show that all organisms appeared yesterday
Q30. Why are viruses difficult to include in the five-kingdom system?
[A]. They lack cellular organisation
[B]. They contain no genetic material
[C]. They are all multicellular plants
[D]. They have a backbone
Must-Revise Points: Diversity and Classification of Living Organisms
- Biodiversity is the variety of life on Earth. Endemic species such as the Nilgiri tahr, lion-tailed macaque and Neelakurinji are found naturally only in India.
- Biodiversity hotspots are regions that are rich in endemic species but have lost much of their habitat. Examples in and around India include the Western Ghats, the Himalayas, Indo-Burma and Sundaland.
- Organisms are classified by cell type, cell wall, level of organisation, mode of nutrition, ecological role, reproduction and genetic (DNA) similarity.
- Classification developed over time: Aristotle grouped animals by habitat, Linnaeus used two kingdoms (1758), Haeckel three (1866), Copeland four (1938) and Whittaker five (1969).
- Monera contains unicellular prokaryotes (bacteria and cyanobacteria). Protista contains unicellular eukaryotes such as Amoeba, Paramecium and Euglena.
- Fungi are heterotrophic, have cell walls made of chitin and mostly act as decomposers. Yeast is unicellular but is placed in Fungi because its cell wall contains chitin.
- Kingdom Plantae has five groups: Thallophyta (Spirogyra), Bryophyta (moss, the amphibians of the plant kingdom), Pteridophyta (ferns, the first with vascular tissue), Gymnosperms (naked seeds, as in pine) and Angiosperms (seeds enclosed in fruits).
- Invertebrates have no notochord. Their phyla range from Porifera (cellular level) and Cnidaria (tissue level) to Platyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca and Echinodermata.
- Chordates have a notochord at some stage of life. Protochordates such as Amphioxus link invertebrates to vertebrates, which include fish, amphibians, reptiles, birds and mammals.
- The hierarchy runs Kingdom → Phylum → Class → Order → Family → Genus → Species. Linnaeus’s binomial names, such as Panthera tigris and Mangifera indica, have a capitalised genus and a lowercase species, written in italics.
Common Traps in Five Kingdom Classification MCQs
- Cyanobacteria are prokaryotes in Monera, even though they photosynthesise like plants.
- Fungal cell walls are made of chitin, while plant cell walls are made of cellulose.
- Viruses are acellular and do not belong to any of the five kingdoms.
- Moving from kingdom down to species means fewer members in each group but more shared features.
- Echinoderms have an internal skeleton but are still invertebrates, because they have no notochord.
These Class 9 Science Exploration Chapter 12 MCQs train you to identify organisms by their key features rather than by memorising lists. Case studies such as the four hornbill species of Pakke Tiger Reserve, the Purple Frog of the Western Ghats, the Sangai deer of Loktak Lake and lichens used as air-quality indicators show why classification matters for conservation and everyday life. Make a simple flowchart of the five kingdoms and the plant and animal groups, since many objective questions test the differences between neighbouring groups.
Strengthen Your Answers with Chapter 12 NCERT Solutions
Next, go through our NCERT Solutions for Class 9 Science Exploration Chapter 12 for well-explained answers to every textbook exercise. They cover why viruses do not fit into the five kingdom system, how bryophytes and pteridophytes differ, the class versus genus question and the detailed case study on organisms P, Q, R, S and T. Solving these alongside the MCQs above will help you approach “Patterns in Life: Diversity and Classification” with confidence in tests and annual exams.
