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.
A disease that cannot be spread is also known as a non-infectious disease. This is a disease that may be caused by the environment (e.g. skin cancer from radiation from the Su â¦ n), or lack of food (e.g. scurvy from lack of Vitamin C), genetic disorders, or any source other than an infection.his is a disease that may be caused by the environment (e.g. skin cancer from radiation from the Su â¦ n), or lack of food (e.g. scurvy from lack of Vitamin C), genetic disorders, or any source other than an infection.