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Growth & DevelopmentHow and why may an organism change over it’s                   lifespan? Animals often exhibit metamor...
GROWTH & DEVELOPMENT• GROWTH – the   Surface to volume  increase in    ratio limits how large  size of an     a cell can g...
Growth in Single-Celled     Organisms         In single-celled           organisms growth           occurs by an          ...
Growth in Multi-celled         OrganismsIn multi-celled  organisms growth  occurs by  production of new  cells Increases ...
Living OrganismsAre capable of :-   1. Detect and react to• Growth and           stimuli  development                    2...
All Species Inventory• in 2001  – international project launched to identify and    record every species on Earth in the n...
• science of organizing organisms into  groups  – those with similar properties being grouped    together  – similarities ...
Taxonomy• three separate but interrelated disciplines  are involved in taxonomy  – identification     • characterizing org...
Prokaryote     Classification• technologies used to  characterize and ID  prokaryotes  – microscopic    examination  – cul...
Taxonomic Classification Categories  • arranged in hierarchical order  • species is basic unit     Domain     KingdomPhylu...
Classification Systems:    a short history  • In, Carl Linnaeus devised the first    classification system, placing    pla...
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Growth & development

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Growth & development

  1. 1. Growth & DevelopmentHow and why may an organism change over it’s lifespan? Animals often exhibit metamorphosis in their development. Can you explain at least one advantage to this “strategy”?
  2. 2. GROWTH & DEVELOPMENT• GROWTH – the Surface to volume increase in ratio limits how large size of an a cell can grow organism
  3. 3. Growth in Single-Celled Organisms In single-celled organisms growth occurs by an increase in cell size Cell can either stay big or divide
  4. 4. Growth in Multi-celled OrganismsIn multi-celled organisms growth occurs by production of new cells Increases the total number of cells in the organism Increases total surface to volume ratio
  5. 5. Living OrganismsAre capable of :- 1. Detect and react to• Growth and stimuli development 2. Reproduction• Metabolism 3. Composed of cells• Homeostatis 4. Contain DNA• Movement 5. Adaptation and evolution
  6. 6. All Species Inventory• in 2001 – international project launched to identify and record every species on Earth in the next 25 years – a very challenging undertaking considering that to date 1.5 million organisms have been named – it is estimated that anywhere from 7 – 100 million living species exist
  7. 7. • science of organizing organisms into groups – those with similar properties being grouped together – similarities are due to relatedness • phylogeny is the study of evolutionary history of organisms – organization of organisms reflect phylogeny or evolutionary relationships
  8. 8. Taxonomy• three separate but interrelated disciplines are involved in taxonomy – identification • characterizing organisms – classification • arranging into similar groups – nomenclature • naming organisms
  9. 9. Prokaryote Classification• technologies used to characterize and ID prokaryotes – microscopic examination – culture characteristics – biochemical testing – nucleic acid analysis – combination of the above is most accurate
  10. 10. Taxonomic Classification Categories • arranged in hierarchical order • species is basic unit Domain KingdomPhylum or Division Class Order Family Genus Species
  11. 11. Classification Systems: a short history • In, Carl Linnaeus devised the first classification system, placing plants and animals in separate systems – Linnaeus placed all microorganism in one genus he named Chaos

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