It can be inferred from the passage that all of the following are with of producing new strains of influenza viruses except ______ . A: two influenza viruses in the same animal recombining B: animal viruses recombining with human viruses C: two animal viruses recombining in one animal D: two animal viruses recombining in a human

Viruses are active all the time.

In recent years viruses have been shown to cause cancer in chickens. Viruses have also been shown to cause cancer in mice, cats, and even in some primates. Viruses might cause cancer in humans.This is a reasonable hypothesis.

Viruses can become a worldwide problem.

Latency is an outcome particularly characteristic of which one of the following virus groups? A: Polioviruses B: Herpes viruses C: Rhinoviruses D: Influenza viruses

Which of the following statements is false? A: Viruses contain DNA or RN B: The nucleic acid of a virus is surrounded by a protein coat. C: Viruses multiply inside living cells using viral mRNA, tRNA, and ribosomes. D: Viruses cause the synthesis of specialized infectious elements.

New strains of viruses are transmitted to man by_____.

Coronaviruses are a large family of viruses that cause disease in humans and birds.

Viruses can reproduce on their own and destroy host cells while bacteria cannot.

The most serious damage caused by the viruses is that ______. A: the computer's functions are lowered B: the normal programs are damaged C: all the information stored in the computer is gone D: the computer infected by the viruses can't be used any longer