Considering the new definition of life, all but one piece evidence supports the fact that a virus must be referred to as an organism. that is:
a) viruses contain nucleic acids.
b) viruses are capable of replication.
c) viruses have a simple cellular structure.
d) viruses have an evolutionary history and that implies lineage.

Answer is C: Viruses have a simple cellular structure.

answer; a male inherits only one allele of the x-linked gene controlling hair color;

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)