Which of the following is true regarding viruses?
SELECT ALL THAT APPLY.
Select one or more:
a. Viruses can be classified by the presence/ absence of an
envelope, the overall morphology, or the genome type.
b. None of these answers are correct.
c. Cells and the immune system have natural defenses against
viruses, but many viruses have mechanisms to defeat them.
d. Viral replication requires host cellular machinery as well as
enzymes that the virus provided.
e. Retroviruses, such as HIV, have a unique life cycle that
involves converting RNA into DNA.