FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Indeed, viruses have the remarkable ability to spread from one host to another host, hosts that belong to the three cellular domains of life-Archaea, Bacteria, and Eukarya. This constitutes their host range.

Detailed explanation-2: -Viruses are small and relatively simple microbes that cannot grow outside of living cells, that is, they are obligate intracellular parasites (Figure 1).

Detailed explanation-3: -A virus is an infectious agent that can only replicate within a host organism. Viruses can infect a variety of living organisms, including bacteria, plants, and animals. Viruses are so small that a microscope is necessary to visualize them, and they have a very simple structure.

Detailed explanation-4: -Viruses may cause disease but some can fall ill themselves. For the first time, a group of scientists have discovered a virus that targets other viruses.