Answer: 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.
<span>Some scientists have presumed
that nature of life may exist with the choice
dictated by the local environment<span>. The primitive
earth illustrated the evolution of the
first heterotrophs from aggregates of organic molecules from the development of
heterotrophic forms according to the existing environmental conditions.</span></span>
Answer:
C. depth C
Explanation:
From the chart you can teel that the most dense, coolest and saltiest waters can be found at the deepest levels of depth, in this case the deepest from the options would be located at less than 3,000 meters and it would be point C. As we know as we go depeer into the water of the ocean pressure increases and with that density of the water also increases, under normal circumstances the sunlight and sun heat is the only thing that is able to heat up the water of the ocean, so the deeper you go, the less sunlight and less sun heat is available so the waters become cooler.
<span>That is because the first animals were usually very small and very soft so there was nothing there that could fosilize. Usually the things that fosilize are bones, and amoebas and their ancestors don't have any so they wouldn't be able to fosilize. The first animals were mostly like unicellular bacteria found nowadays or similar things.</span>
If a student refuses to wear safety googles in the laboratory such a student should not be allowed to participate in the laboratory activities for that day and he or she should be penalized for disobeying one of the important laboratory regulations.<span />