Ecological concepts

WAEC Biology Revision Notes

  • Ecology
  • SS1 · Second Term
  • 3 min read
  • Checked by imtiaz ahmed

Ecology and its branches, the key ecological terms from habitat to biosphere, and the living and non-living components of an ecosystem.

In these notes
  1. Key terms
  2. Parts of the earth
  3. Components of an ecosystem
  4. Feeding roles
  5. How an ecosystem works
  6. Population density and carrying capacity
  7. Branches of ecology
  8. Types of habitat
  9. The biosphere
  10. Natural and artificial ecosystems
  11. Worked theory answer

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All Biology notes
  1. SS1
    1. Living Things and Classification
      1. Biology and living things
      2. Practical biology and laboratory skills
      3. Classification and the five kingdoms
      4. The plant kingdom
      5. Invertebrates
      6. Vertebrates
      7. Organisation of life
    2. The Cell
      1. The cell as a living unit
      2. Cell structure and functions
      3. The cell and its environment
    3. Nutrition and Digestion
      1. Modes of nutrition
      2. Photosynthesis
      3. Mineral nutrition in plants
      4. Food substances and balanced diet
      5. Enzymes
    4. Transport, Respiration and Excretion
      1. Cellular respiration
    5. Coordination, Support and Movement
      1. Irritability and plant responses
      2. Movement
    6. Reproduction and Growth
      1. Cell division: mitosis and meiosis
      2. Growth
      3. Asexual reproduction
      4. Reproduction in unicellular organisms and invertebrates
    7. Ecology
      1. Ecological concepts
      2. Biomes
      3. Ecological factors and population studies
      4. Food chains and energy flow
      5. Ecological associations and tolerance
    8. Biology and Human Welfare
      1. Microorganisms
      2. Diseases, vectors and public health
      3. Sexually transmitted infections
      4. Biology in agriculture
      5. Pests and diseases of crops and livestock
      6. Food production and storage
  2. SS2
    1. Nutrition and Digestion
      1. Feeding mechanisms and dentition
      2. Alimentary canal and digestion
    2. Transport, Respiration and Excretion
      1. Blood and circulation
      2. Transport in plants
      3. Gaseous exchange
      4. Excretion
    3. Coordination, Support and Movement
      1. Supporting tissues in plants
      2. Skeleton, joints and muscles
    4. Reproduction and Growth
      1. Human reproduction
      2. Flowers and pollination
    5. Ecology
      1. Aquatic habitats
      2. Terrestrial habitats
      3. Nutrient cycles
      4. Pollution and conservation
      5. Succession and population
  3. SS3
    1. Transport, Respiration and Excretion
      1. Homeostasis: kidney, liver and skin
    2. Coordination, Support and Movement
      1. Hormones
      2. Nervous coordination
      3. Sense organs
    3. Reproduction and Growth
      1. Reproduction and development in animals
      2. Seeds, fruits and germination
    4. Genetics and Evolution
      1. Variation
      2. Adaptation and social insects
      3. Evolution
      4. Mendel's laws and inheritance
      5. Chromosomes, genes and DNA
      6. Sex determination, sex linkage and blood groups
      7. Applications of genetics

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