Q1
Classification of organisms is mainly based on:
Ashared characteristics
Btheir names only
Ctheir age
Dtheir colour only
CBSEClass 6 (CBSE)ScienceCh 2 · Topic 3
Classifying Living Organisms
Learning the basis on which living organisms are grouped and classified.
Core concept
Within the animal kingdom, organisms are grouped by features such as whether they have a backbone (vertebrates) or not (invertebrates), and further into categories like mammals, birds, reptiles, amphibians, and fish. Plants are classified by features such as whether they produce flowers or seeds, and their overall size and structure (trees, shrubs, herbs). Classification systems have evolved over centuries — early classification was based only on visible features, while modern classification also uses genetic information.
Exam highlight
Key diagram
- Show a simple grouping chart classifying organisms into plants and animals, then further sub-groups.
Keywords worth remembering
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Quick notes
• Classification groups organisms based on shared characteristics.
• Animals are broadly grouped as vertebrates (with backbone) or invertebrates (without backbone).
• Plants are classified by features like flowering/seed-bearing and overall size and structure.
• Modern classification also uses genetic information, not just visible features.