Explanation
The virus was discovered by Dmitry Ivanowaski when he used a bacterial filter for filtration of sap from an infected tobacco plant and showed the presence of viruses in the filtered sap. Stanley was a journalist and explorer. Herelle was a French Canadian microbiologist. Beijerinck was a Dutch microbiologist.
The correct answer is B.
SARS i.e Severe Acute respiratory syndrome is caused by corona virus, which belongs to the family of viruses causing the common cold. SARS is the serious respiratory illness which can sometimes cause death. It is a contagious disease which spreads from person to person.
Like other living organisms, viruses don’t have nuclei and organelles, (which are essentials of a living cell) but they are considered as living because they reproduce inside their host body by serious of chemical reactions, and hence multiply there number inside the host body.
The correct answer is A.
A virus is an infectious agent which needs a host or living cell to replicate itself. It cannot be cultivated in a lifeless media and cannot grow outside the living cell. IT can affect all living organisms i.e. humans, plants animals etc.
The correct answer is E.
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