The two gasses that make up 99% of the earth's atmosphere are nitrogen and oxygen.
Hope that helped! =)
Answer:
a. DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original
c. Each new DNA molecule contains an original strand and a newly synthesized strand.
Explanation:
DNA replication is an important process every cell must undergo prior to division. DNA replication is the process whereby DNA content is doubled. It occurs as a result of an enzyme called DNA polymerase, which synthesizes nucleotides.
DNA replication follows the semi-conservative model which uses one original DNA strand to synthesize a new DNA strand. The double-stranded DNA is separated into two single strands which serve as template for new strands. Due to the action of DNA polymerase, DNA replication proceeds in a 5' to 3' direction in the new DNA molecule and in the opposite direction in the original.
Also, each newly synthesized DNA molecule which is similar to one another contains an original strand (template) and a newly synthesized strand.
Answer:
<em>If crossing over did not occur there would be no diversity among organisms.</em>
Explanation:
Crossing over and independent assortment are the two phenomena of meiosis by which genetic and physical diversity occurs. If crossing over did not occur then there would not be changes in the physical features of children. No physical diversity would be produced. Children would have the same physical features as the parents. Each chromosome would be identical to one of the parents and hence there will be reduced variations.
