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  • CB4
    • Genetic Engineering.
      • The process of manually adding new DNA to an organism.
        • The goal is to add one or more new traits that are not already found in that organisms.
          • Genetic engineering:  Advantage:  genetic engineering, most of the diseases and illnesses can easily be prevented through isolating the exact gene that causes them.
            • Genetic engineering: Disadvantage: it can pose potential health risks.
    • CB4
      • natural selection:   organisms That are better adapted to their environment tend to survive longer and transmit more of their genetic characteristics to succeeding generations than do those that are less well adapted.
      • Selective breeding
        • Selective breeding or artificial selection is when humans breed plants and animals for particular genetic characteristics.
        • steps taken for selective breeding
          • Deciding which characteristics are important enough to select.
            • Choosing parents that show these characteristics from a mixed population.
              • Breeding these parents together.
                • Choosing the best offspring with the desired characteristics to produce the next generation.
                  • Repeating the process continuously over many generations, until all offspring show the desired characteristics.
      • classification
        • plants
        • prokaryotes (bacteria, blue-green algae)
        • Protoctits
        • Kingdom, phylum, class, order, family, genus, specie
        • animals(all multicellular animals)
        • fungi moulds ,yeast,mushrooms.
      • evidence of natural selection


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