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Virusi

5 razred osnovne skole

Tanja
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Virusi

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  1. VIRUSI

  2. VIRUSI • zarazne čestice na granici žive i nežive prirode VIROLOGIJA • nauka o virusima VIROZE • zarazne bolesti uzrokovane virusima biljni virusi bakteriofag HIV virus side

  3. virusi uzrokuju bolesti: • ljudi (grip, SIDA, boginje…) • životinja • biljaka • bakteriofagi napadaju bakterije • delotvornog leka nema, ali zaraza se može sprečiti

  4. šare na laticama lale uzrokovane biljnim virusima • list zaražen virusom mozaične bolesti duvana

  5. građa virusa Nasledni materijal RNA ili DNA omotač virus gripa bakteriofag

  6. virusi - na granici žive i nežive prirode • ne sadrže osnovne delove ćelije • (organele) osobine nežive prirode • van ćelija ne mogu da prežive • osobine žive prirode pokazuju samo unutar domaćina gde se RAZMNOŽAVAJU

  7. PROVERIMO ZNANJE: 1) Opišite građu virusa! Nasledni materijal RNA ili DNA omotač virus mozaične bolesti duvana bakteriofag

  8. PROVERIMO ZNANJE: 2) Zašto za viruse kažemo da su na granici žive i nežive prirode? • imaju neke osobine žive prirode i neke osobine • nežive prirode 3) Nabrojite neke bolesti koje uzrokuju virusi! • gripa, boginje, SIDA… 4) Šta prikazuje slika? • bakteriofaga koji napada bakteriju

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