The lion (Panthera leo) is one of the five big cats in the genus Panthera and a member of the family Felidae. The commonly used term African lion collectively denotes the several subspecies found in Africa. With some males exceeding 250 kg (550 lb) in weight, it is the second-largest living cat after the tiger.
Rating Newest Oldest. Best Answer: Viruses are obligate intracellular parasites that can be maintained only inside living cells. Whern we refer to something as obligate that indicates that the virus (in this case) must do or behave in the specified manner. Since viruses are obligate intraellular parasites, the term conveys the idea that viruses must carry out their reproduction by parasitizing a host cell.
Classification of viruses is defined by host preference, viral morphology, genome type and auxiliary structures such as tails or envelopes. Viral particles outside a host cell (so called virions) are inert entities with a genome surrounded by a protective coat. Viruses that attack bacteria were named âbacteriophages'.The term phage originates from Greek phagein, which translates as âto eat'.MBO J 28, 821â829 (2009); published online 8 April 2009 [PMC free article] [PubMed]. Viruses are minuscule infectious particles composed of a protein coat and a nucleic acid core. They exist in a huge variety of forms and infect practically all living creatures: animals, plants, insects and bacteria.