AS Biology Unit 2 Topics AQA

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  • UNIT 2
    • Variation
      • investigating variation
      • types of variation
    • DNA and Meiosis
      • Structure of DNA
      • Triplet code
      • DNA  and chromosomes
      • meiosis and genetic variation
    • Variety of Life
      • haemoglobin
      • oxygen dissociation curves
      • Starch, Glycogen and Celulose
      • Plant cell structure
    • The Cell Cycle
      • Replication of DNA
      • Mitosis
      • The Cell Cycle
    • Cellular Organisation
      • Cell differentiationand organisation
    • Exchange and Transport
      • exchange between organisms and their environment
      • gas exchange in single-cell organisms and insects
      • gas exchange in fish
      • gas exchange in a leaf
      • circulatory system of a mammal
      • blood vessels and functions
      • movement of water through roots
      • movement of water up stems
      • transpiration and factors affecting it
      • Limiting water loss in plants
    • Classification
    • Evidence for relationships between Organisms
      • Genetic comparisons using DNA and Proteins
      • Courtship behaviour
    • Adaption and Selection
      • Genetic variation in bacteria
      • antibiotics
      • antibiotic use and resistance
    • Biodiversity
      • Species diversity
      • species diversity and human activities

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