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CLASSIFICATION SYSTEMS

CLASSIFICATION SYSTEMS. CH 2.3 LIFE OVER TIME. Why do we need a system to classify living organisms?. New Species.

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CLASSIFICATION SYSTEMS

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  1. CLASSIFICATION SYSTEMS CH 2.3 LIFE OVER TIME

  2. Why do we need a system to classify living organisms?

  3. New Species Match-tip tiny, Brookesiamicra (juvenile pictured) is the smallest of four new chameleon species found on the African island country of Madagascar. With an average adult length of just over an inch (2.9 centimeters) from snout to tail, B. micra is among the tiniest reptiles in the world.

  4. THREE DOMAINS

  5. Domains Classify organisms by their cellular structure

  6. THREE DOMAINS BACTERIA Smaller than Eukarya cells and have no nucleus ARCHAEA Have distinctive chemistry and can survive extreme environments

  7. THREE DOMAINS Eukarya Larger and contain more complex structures

  8. SIX KINGDOMS

  9. PLANTAE • 250,000 species of plants • Multicellular • Eukaryotes • Autotrophs • Cell walls • Cannot move from place to place

  10. ANIMALIA • One million species • 90% are insects • Multicellular • Eukaryotic • No cell walls • Have mouths/nervous system • Heterotrophs • Can more around at least part of their life

  11. PROTISTA • Wide variety of organisms • Most unicellular • Large complex cells with little specialization • Eukaryotes/autotrophs • Most live in water • Most are microscopic • Some are large like seaweed

  12. FUNGI • Three categories • Mushrooms • Molds • Yeasts • Take nutrients from surroundings • Decomposers • Cell walls • Remain rooted in one place

  13. ARCHAEA • Do not have nuclei • Larger than bacteria • More organization than bacteria • Live in many environmentsespecially oceans • Live in extreme environments

  14. BACTERIA • Live everywhere • Unicellular • Small simple cells • No nuclei • Cell wall • Reproduce through binary fission

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