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Classification of Living Things

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Classification of Living Things Introduction to the Modern System By Ms. Kasem Need for Classification Living things have characteristics in common such as the ... – PowerPoint PPT presentation

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Title: Classification of Living Things


1
Classification of Living Things
  • Introduction to the Modern System
  • By Ms. Kasem

2
Need for Classification
  • Living things have characteristics in common such
    as the functions or activities that are necessary
    to maintain life.
  • In order to study living things in an organized
    and efficient way, biologists find it necessary
    to classify or group organisms in a logical way.

3
Basis for Classification
  • The most common basis for classifying organisms
    is similarities in structure.
  • Such as the exoskeleton, appendages, organs, or
    cellular structures (chloroplasts, nuclei).
  • Biochemical and genetic similarities, in patterns
    of embryological development, and fossil evidence
    are also used for classification.

4
Modern System of Classification
  • Our modern classification system assumes that
    present day forms of life developed from earlier
    forms.
  • The Kingdom is the largest classification group.
  • Today, most biologists group organisms into a
    six-kingdom system
  • Archaebacteria (ancient bacteria), Eubacteria
    (true bacteria), Protista, Fungi, Plantae, and
    Animalia

5
Classification Standards
  • The six kingdom system is based on the following
    standards
  • 1. The presence or absence of a nuclear
    membrane within the cell.
  • 2. Whether the organism is unicellular
    (one-celled) or multicellular (many celled)
  • 3. Type of nutrition

6
Subdivisions of Kingdoms
  • Kingdom
  • Phylum
  • Class
  • Order
  • Family
  • Genus
  • Species -includes all organisms of the same kind

7
Scientific Names
  • Common names are not used, Latin is used for
    scientific naming because it is the universal
    language of science and it is accepted worldwide.
  • Binomial Nomenclature- consist of a genus and
    species name for each organism.
  • These names are written in italics.
  • The genus name is capitalized and the species
    name is not capitalized.
  • Homo sapiens.man
  • Canis familarisdog
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