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Concept Maps

Organisms and Populations — Concept Maps

ICSE · Class 12 · Biology

4 concept maps of Organisms and Populations for ICSE Class 12 Biology, each also written out as a text outline. Part of the ICSE Class 12 Biology syllabus.

60 questions54 flashcards7 formulas & key relations5 concepts

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An illustration showcasing various examples of commensalistic relationships, such as an orchid on a mango branch, barnacles on a whale, and cattle egret with grazing cattle.
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4 Concept Maps

Population Growth Models Comparison

Population Growth Models Comparison

The map in words

  • POPULATION GROWTH
    • Exponential Growth\nJ-shaped curve
      • Formula: dN/dt = rN
      • Unlimited resources\nIdeal conditions
      • N increases without limit
    • Logistic Growth\nS-shaped sigmoid curve
      • Formula: dN/dt = rN × K-N / K
      • Limited resources\nReal conditions
      • N approaches K\nCarrying capacity
      • K-N/K = 0 when N=K\ngrowth stops

Population Interactions Summary Table

Population Interactions Summary Table

The map in words

  • Interaction Type
    • Effect on Species A / B
      • Mutualism: +/+\nBoth benefit\nLichen, Mycorrhiza
      • Commensalism: +/0\nOne benefit, one neutral\nBarnacle on whale
      • Competition: -/-\nBoth harmed\nGause's exclusion
      • Predation: +/-\nPredator+, Prey-\nLynx and hare
      • Parasitism: +/-\nParasite+, Host-\nCuscuta, Plasmodium
      • Amensalism: 0/-\nOne neutral, one harmed\nPenicillium vs bacteria

Population Attributes and Measurement Methods

Population Attributes and Measurement Methods

The map in words

  • POPULATION ATTRIBUTES
    • Density N
      • Count per unit area\nQuadrat / Mark-recapture
    • Natality birth rate b
      • Increases population
    • Mortality death rate d
      • Decreases population
    • Age Distribution
      • Broad base: Growing
      • Bell shape: Stable
      • Narrow base: Declining
    • Sex Ratio
      • More females = faster growth

Organisms and Populations

Organisms and Populations

The map in words

  • Organisms and Populations
    • Levels of ecological organization
    • Population
    • Population interactions
    • Positive interspecific interactions
    • Negative interspecific interactions
    • Population growth
    • Growth curves
    • Age pyramids

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Frequently Asked Questions

What are the important topics in Organisms and Populations for ICSE Class 12 Biology?
Key topics in Organisms and Populations include Levels of Ecological Organisation, Population Interactions, Examples of Positive and Negative Interactions, Population Density, Birth Rate, Death Rate, and Growth. Study these first, then practise questions on each for the ICSE Class 12 board exam.
What do the concept maps for Organisms and Populations show?
The 4 maps show how the ideas in Organisms and Populations connect: Population Growth Models Comparison; Population Interactions Summary Table. Each map is also written out as an outline on this page.
How should I revise Organisms and Populations for the ICSE Class 12 board exam?
Learn the core ideas first, then work through the 60 practice questions on Organisms and Populations. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All ICSE Class 12 Biology Concept Maps

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