The average human gene contains about 10% and 90% sequences
a. exon; intron
b. conserved; divergent
c. divergent; conserved
d. intron; exon
e. repetitive; unique

The correct answer is a. "exon; intron".

Explanation:

According to the article "Distributions of exons and introns in the human genome" published in the scientific journal "In silico biology", an average human gene have 8.8 exons and 7.8 introns. Regardless of having similar proportions, human exons and introns differ in their lenght. An average exon's length is about 170 bp, when the average intron's length is 5419 bp. Therefore, most of the genetic material is comprised of introns (90%), while only a small part is comprised of exons (10%).

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus

answer; cnidarians;