Question

Viruses are still a mystery for today's scientists and they are still researching on it. actually, it cannot be confirmed if it is a living organism or a non living thing. this is because if seen individually under the electron microscope, they don't show any signs of life. but when they enter the host organism, they start to multiply and show signs of life. thus, it is said that they are considered as a border line between living and non living things.

Answer 1

Viruses are mysterious because they fall on threshold of living and non living beings.They are tiny microorganisms,about thousand times smaller than bacterial cells.Viruses do not have enzymes or the chemicals which are important for sustaining chemical reactions.Thus viruses need host cell such as bacteria,plant or animal to exsist,grow and reproduce to act like a living being.They do not have a proper cellular machinery or organisation and only act as living when inside a host. They are not even capable of multiplying on their own but still when they attack living organisms, they can cause serious diseases like HIV AIDS.