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.
<span>positive self talk is the best source of internal motivation.</span>
C) a system is a set of parts that function together as a whole
The answer is nucleotides
A galaxy where mainly stars and planets form around one or more spiral arms. (usually more?)