Question

4. Fill in the gaps in these sentences: 1)Virology is often considered as a part of_______. 2)Viruses can be classified according to ______they infect. 3)Another classification uses the geometrical shape of their ____or the virus's structure. 4)A virus is a small _____that can replicate only inside the living cells of organisms. 5)Viruses are found in almost every _______on 216 Earth. 6)Viruses cause a number of diseases in _______. 7)Viral infections in animals provoke ________that usually eliminates the infecting virus. 8)The evolution of viruses, which often occurs in concert with the evolution of their hosts, is studied in the field of_______. 9)While viruses ______and_____, they don't engage in metabolism and depend on a host cell for reproduction.

Answer 1

1 Virology is often considered as a part of microbiology
2 Viruses can be classified according to the host cell they infect: animal viruses, plant viruses, fungal viruses,and bacteriophages (viruses infecting bacteria, which include the most complex viruses).
3 Another classification uses the geometrical shape of their capsid (often a helix or an icosahedron) or the virus's structure (e.g. presence or absence of a lipidenvelope).
4 A virus is a small infectious agent that can replicate only inside the living cells of organisms.
5 Viruses are found in almost every ecosystem on Earth.
6 Viruses cause a number of diseases in eukaryotes.
7 Viral infections in animals provoke an immune response that usually eliminates the infecting virus.
8 The evolution of viruses, which often occurs in concert with the evolution of their hosts, is studied in the field of viral evolution.
9 While viruses reproduce and evolve, they don't engage in metabolism and depend on a host cell for reproduction.

Answer 2

1) Virology is often considered as a part of microbiology. 2) Viruses can be classified according to the organisms they infect. 3) Another classification uses the geometrical shape of their capsid or the virus's structure. 4) A virus is a small infectious agent that can replicate only inside the living cells of organisms. 5) Viruses are found in almost every ecosystem on Earth. 6) Viruses cause a number of diseases in humans. 7) Viral infections in animals provoke immune responses that usually eliminate the infecting virus. 8) The evolution of viruses, which often occurs in concert with the evolution of their hosts, is studied in the field of viral evolution. 9) While viruses evolve and mutate, they don't engage in metabolism and depend on a host cell for reproduction.