Applicable for A-Level, IB, DSE, AP-Level Exams

Biological Molecules    Cell Structure    Cell Transport    Immunology    Exchange    Mass Transport    DNA, Genes & Protein Synthesis    Genetic Diversity    Biodiversity    Photosynthesis    Respiration    Energy & Ecosystems    Stimuli and Response    Nervous Coordination & Muscles    Homeostasis    Inheritance    Populations & Evolution    Ecosystems    Gene Expression    Recombinant DNA Technology   

Species and Taxonomy

Domain Kingdom Phylum Class Order Family Genus Species are how organisms are classified under the taxonomy system. A species is defined as a group of organisms that are able to reproduce to produce fertile offspring. A hierachy is where large groups are divided into smaller subgroups with no overlap between the groups.

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Biodiversity is the variety of all the life on Earth. An index of diversity describes the relationship between the number of species in a community and the number of individuals in each species. Conserving biodiversity is crucial for life Earth.

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Balance between Conservation & Farming

Farming practices must be moderated in order to conserve biodiversity yet also maximise profit and income. The removal of hedges, for example, reduces biodiversity of species that live within the hedges, however, this is done on the expense of greater farming area so more profit for farmers.

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Classification using DNA or Proteins

To investigate genetic diversity, direct investigations of DNA sequences has replaced inferring DNA differences from measurable or observable characteristics. The base sequence of DNA, mRNA or the amino acid sequence can be investigated.

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