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.
They are obligate intracellular parasites. Before a virus has entered a host cell, it is called a virion, a package of viral genetic material. Virions can be passed from host to host through direct contact or through a vector (an animal carrier who is not affected by the virus--often insects).Inside the organism, the virus can enter the cell in various ways.hey are obligate intracellular parasites. Before a virus has entered a host cell, it is called a virion, a package of viral genetic material. Virions can be passed from host to host through direct contact or through a vector (an animal carrier who is not affected by the virus--often insects).