Patterns in Life Diversity and Classification — Class 9 Science NCERT Solutions (Free)
Free step-by-step NCERT solutions for Class 9 Science chapter "Patterns in Life Diversity and Classification" — 8 important questions with detailed answers for CBSE board exam preparation.
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TL;DR: Free step-by-step NCERT solutions for Class 9 Science chapter "Patterns in Life Diversity and Classification" — 8 important questions with detailed an…
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Key Questions Covered:
- What is classification? Why is it necessary to classify living organisms?
- Explain the hierarchical classification system. Give the hierarchy levels.
- Describe the five kingdom classification system.
- Explain the main groups of plant kingdom with examples.
- Explain the main groups of animal kingdom with examples.
- Classify human being according to the five kingdom system.
- + 2 more questions in the full chapter
Solutions Summary:
| Question | Status |
|---|---|
| What is classification? Why is it necessary to classify l… | ✓ Solved |
| Explain the hierarchical classification system. Give the … | ✓ Solved |
| Describe the five kingdom classification system. | ✓ Solved |
| Explain the main groups of plant kingdom with examples. | ✓ Solved |
| Explain the main groups of animal kingdom with examples. | ✓ Solved |
| Classify human being according to the five kingdom system. | ✓ Solved |
Showing 6 of 8 questions
Q1: What is classification? Why is it necessary to classify living organisms?
Classification = Organizing living organisms into groups based on their similarities and differences.
Necessity of classification:
(1) Identify organisms easily
(2) Understand relationships between organisms
(3) Understand evolution of organisms
(4) Study diversity of life
(5) Predict properties of unknown organisms
(6) Make study of biology systematic and organized
Biological classification groups organisms based on:
• Morphological features (body structure)
• Anatomical features (internal stru...
Q2: Explain the hierarchical classification system. Give the hierarchy levels.
Hierarchical classification = Grouping of organisms from broadest to most specific category.
Hierarchy levels (Kingdom → Species):
(1) Kingdom: Largest, most general group (e.g., Animalia, Plantae)
(2) Phylum: Major subdivisions within kingdom (e.g., Chordata, Arthropoda)
(3) Class: Subdivisions of phylum (e.g., Mammalia, Insecta)
(4) Order: Subdivisions of class (e.g., Primates, Coleoptera)
(5) Family: Subdivisions of order (e.g., Hominidae, Carabidae)
(6) Genus: Group of similar species (e.g.,...
Q3: Describe the five kingdom classification system.
Five Kingdom Classification (Whittaker, 1969):
(1) Monera: Prokaryotes (bacteria, cyanobacteria)
• Single-celled, no nucleus
• Cell wall present
• Example: E. coli
(2) Protista: Single-celled eukaryotes
• Nucleus present
• Live in moist/aquatic environment
• Example: Amoeba, Euglena, Paramecium
(3) Fungi: Multi-cellular eukaryotes
• Cell wall of chitin (not cellulose)
• Absorb nutrients (heterotrophic)
• Example: Mushroom, Yeast, Bread mould
(4) Plantae: Multi-cellular eukaryotes, autotrophic
• ...
Q4: Explain the main groups of plant kingdom with examples.
Major groups of plant kingdom (based on vascular tissue and reproduction):
(1) Algae: Primitive plants; mostly aquatic
• Examples: Green algae (Chlamydomonas), Brown algae (Kelp), Red algae
• Reproduce by spores or vegetative propagation
(2) Bryophytes: Non-vascular plants; depend on moisture
• Examples: Moss, Liverwort
• Require water for sexual reproduction
(3) Pteridophytes: Vascular plants without seeds
• Examples: Fern
• Reproduce by spores
(4) Gymnosperms: Seed-bearing plants; seeds expose...
Q5: Explain the main groups of animal kingdom with examples.
Major groups of animal kingdom (based on presence of backbone):
(1) Porifera: Sponges
• Most primitive; no true tissues
• Sessile (fixed to surface)
• Example: Bath sponge
(2) Cnidaria (Coelenterates): Radially symmetrical
• Two body layers
• Have tentacles with stinging cells
• Example: Hydra, Jellyfish, Coral
(3) Platyhelminthes: Flatworms
• Bilaterally symmetrical
• Flattened body
• Example: Planaria, Tapeworm
(4) Arthropoda: Jointed legs; exoskeleton
• Most diverse; largest phylum
• Example:...
Q6: Classify human being according to the five kingdom system.
Human classification in five kingdom system:
Kingdom: Animalia (multi-cellular, heterotrophic, eukaryotic)
Phylum: Chordata (has backbone/spinal cord)
Class: Mammalia (warm-blooded, hair, mammary glands for lactation)
Order: Primates (opposable thumbs, forward-facing eyes, large brain)
Family: Hominidae (apes and humans)
Genus: Homo (upright posture, large brain)
Species: sapiens (wise human)
Full notation: Homo sapiens
Key characteristics: Bipedal, large brain (1400 cm³), complex language, tool...
Showing 6 of 8 questions. Visit the full page for complete solutions.
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