Topic Summaries

Updates to classification

GCSE > Biology > WJEC > GCSE Biology Topic Summaries > Species and classification > Updates to classification
Previous Module
Next Module

Plant disease and monoclonal antibodies

The brain and the eye

Reproductive hormones and plant hormones

Genetic engineering and modification

Resource cycles and environmental change

Science skills: Measuring results

  • New models of classification have been proposed due to:
    • Developing evidence of internal structures due to improvements in microscopes.
    • Increased understanding of biochemical processes.
    • Development of techniques such as genome mapping.
  • Due to evidence available from chemical analysis, there is now a ‘three-domain system’ developed by Carl Woese. In this system, organisms are divided into:
    • Archaea (primitive bacteria usually living in extreme environments).
    • Bacteria (true bacteria).
    • Eukaryota (including animals, plants, protists, and fungi).

Unlock Updates to classification

Subscribe to SnapRevise+ to get immediate access to the rest of this resource.

Premium accounts get immediate access to this resource.

Previous Module
Next Module