The strange world of viruses

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Complete the text with the words provided to you, Read it very carefull. You can work in pairs.

Àlex MT

Spain

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Fill in the Blanks The strange world of virusesOnline version Complete the text with the words provided to you, Read it very carefull. You can work in pairs. by Àlex MT 1 move infectious envelope small reproduction habitat alive shell Nucleic Capsid assemble cells influenza Viruses are not , so they are not really living things . They cannot carry out any vital functions . They are and they infect cells . They can reproduce . They are parasites because they always need a host . These are some of their main characteristics : · They are very . We can only observe them under an electronic microscope . · The are unable to , so they have no legs , flagellum or cillium . · Their is very extensive . They can be found on the ground , in the air and in the water . Viruses are very simple microorganisms . They have only 3 parts : · acid : It is the genetic material , protected by a capsule . · : It is a made of proteins that covers and protects the genetic material . It can have different shapes . Viruses like have a round shell . · Viral : It covers the capsid , but not all viruses have one . Only especial viruses like influenza or AIDS are covered by this particular shell . The infection process stars when the virus enters the cell . Then the virus starts the process , creating viral components from its genetic material . Later , the viral components and a new virus comes out from the cell .