The mane of the adult male lion, unique among cats, is one of the most distinctive characteristics of the species. It may provide an excellent intimidation display; aiding the lion during confrontations with other lions.
Answer 3: Viruses are not considered alive because they lack many of the properties that scientists associate with living organisms. Primarily, they lack the ability to reproduce without the aid of a host cell, and don't use the typical cell-division approach to replication.nswer 3: Viruses are not considered alive because they lack many of the properties that scientists associate with living organisms. Primarily, they lack the ability to reproduce without the aid of a host cell, and don't use the typical cell-division approach to replication.
Viruses are very small particles capable of infecting every type of living organism. They are parasitic and can only reproduce inside living cells. For example: 1  the tobacco mosaic virus â this stops chloroplasts forming in tobacco plants and causes the tobacco leaves to become discoloured.2  the influenza virus â this causes flu.3  HIV (human immunodeficiency virus) â this causes AIDS.hey are parasitic and can only reproduce inside living cells. For example: 1  the tobacco mosaic virus â this stops chloroplasts forming in tobacco plants and causes the tobacco leaves to become discoloured. 2  the influenza virus â this causes flu. 3  HIV (human immunodeficiency virus) â this causes AIDS.