Question

Explain viruses are said to be at the threshold in life

Answer 1

hey user here is ur answer!!!!!!!

They are known as the threshold of life because they are neither living nor dead - living because they can reproduce and dead because they need the host to continue their life cycle - they cannot reproduce and survive without a host.

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Answer 2

Because virus is neither alive nor dead

Explanation:

• Virus is considered living and non-living according to their presence in host or outside the host. If a virus is present outside the host they do not show any metabolic activities therefore they are considered as non-living.
• When they are introduced in their host they can replicate and form proteins. So in a host, they are considered as living.  
• Therefore as virus is both living and nonliving they are considered to be at the threshold in life. All virus requires a host to live and are intracellular parasite.

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