5. Which of the following statements describes processes that occur during DNA replication?
A. A DNA sequence is read by RNA polymerase, which produces another
RNA strand complementary to the first strand.
B. Two free-floating single strands of DNA are joined by polymerase. The
polymerase finds the point at which the two strands will match up into a
double strand.
C. Messenger RNA are decoded by a ribosome to produce an amino
acid chain. In the cell's cytoplasm, transfer RNA joins the messenger RNA,
forming a polypeptide.
D. A double-stranded DNA molecule is unwound into single strands.
Polymerase matches the right nucleotides to the single strand so that
each forms a double strand of DNA.

A double-stranded DNA molecule is unwound into single strands. Polymerase matches the right nucleotides to the single strand so that each forms a double strand of DNA.

Explanation: During replication, a double-stranded DNA molecule is unwound by an enzyme known as helicase into two single strands of DNA that serve as templates for new strands of DNA.

Then another enzyme known as DNA polymerase matches the free and right nucleotides to the nucleotides on the single DNA strands (templates) to form a double-stranded DNA molecule.

it will increase due to the time span

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.