Why are viruses referred to as obligate fuasites? a. Viral DNA always inserts itself into host DNA,
b. They connot reproduce ouside of a host cell.
c- the must use anzymes ecoded by theviras itself.
d- they invariably kilang cell they infect,

b. They cannot reproduce outside of a host cell.

Explanation:

Viruses are parasitic organisms that need a host in order to thrive and reproduce. This means that they cannot replicate outside of a host cell, but can only do this by parasitizing it. They have to find a host cell in order to continue their life-cycle or else they won't thrive. The word "obligate" means being restricted to a specific mode or function in life. This shows that the virus has a restriction when it comes to reproduction. It cannot reproduce without finding a host cell.

b - the respond is innate and varies over time.

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human impact on the environment can be seen in the deterioration of the !

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