Ans 1:
A virus is a microscopic organism that can replicate only inside the cells of a host organism. Most viruses are so tiny they are only observable with at least a conventional optical microscope. Viruses infect all types of organisms, including animals and plants, as well as bacteria and archaea. Approximately 5000 different viruses have been described in detail at the current time, although it is known that there are millions of distinct types. Viruses are found in virtually every ecosystem on Earth, and these minute life forms are thought to be the most abundant type of biological entity. The study of viruses is known as virology, a specialty within the field of microbiology.
Ans 2:
An infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.
Ans 3:
A piece of code which is capable of copying itself and typically has a detrimental effect, such as corrupting the system or destroying data.
Ans 4:
Viruses are tiny organisms that may lead to mild to severe illnesses in humans, animals and plants. This may include flu or a cold to something more life threatening like HIV/AIDS.
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