CBSE 9 Science · U1
World of Living
Syllabus-listed 27-mark theory unit covering Cells, Tissues, Reproduction, and Diversity in the Living World. The syllabus expects observation, classification, diagram work, plant and animal cell structure, cell organelles, permeability, cell division, plant and animal tissues, reproduction in plants and animals, and biodiversity/classification ideas.
Test yourself
A focused, distraction-free run through 80 multiple-choice questions. Hints if you need them; your score at the end.
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Topic 1.1
Cell Structure and Cell Processes
Plant and animal cells, prokaryotic and eukaryotic cells, organelles, permeability, osmosis and cell division.
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Topic 1.2
Plant and Animal Tissues
Meristematic and permanent tissues, simple and complex tissues, animal tissues, joints and care of the musculoskeletal system.
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Topic 1.3
Reproduction in Plants and Animals
Asexual and sexual reproduction, flowering plants, human reproductive systems, fertilisation, embryo development and reproductive health.
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Topic 1.4
Diversity and Classification
Need for classification, five-kingdom approach, levels of organisation, body plans and scientific naming.
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Topic 1.5
Integrated Biology and Practical Reasoning
Observation skills, experiments, cell health, tissue repair and mixed application across Unit I.
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