The answer is A. Amniotic sac
DNA polymerase is an enzyme which is needed for the synthesis of new DNA strand on the old DNA template. In order to synthesize new DNA strand, DNA polymerase requires many other enzymes or molecules such as:
1. All four deoxyribonucleotides triphosphates
2. Single stranded DNA template
3. Inorganic phosphate 3')H end of new DNA strand
During DNA replication, the double stranded DNA molecules mush unwind and form single stranded structures so the both the strands can be replicated simultaneously.
Answer:
Photosynthesis and Cellular respiration take place in the carbon cycle
Explanation:
One of 4 biogeochemical cycles
carbon cycle
Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO2) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration.
Plasma even though considered to be among the 4 fundamental phases of matter has signif different properties from the other three phases (solid, liquid and gas).
Unlike the other three, plasma doesn't naturally exist on the Earth under normal surface conditions, and can only be made under artificial conditions from neutral gases.
Plasma in simple words is a collection of ionized particles. An ionized gas is plasma. It's a collection of electrons with positively charged gaseous ions.
It is associated with the interior of the sun and other stars.
One another marked difference is that unlike the common solid-liquid-gas phase transitions, phase transitions with plasma do not take only by varying pressure and temperature.
Plasma is generated by ionizing a gas using a strong electromagnetic field and/or heating the gas to fantastically high temperatures (so high that it could melt any ordinary container; for this reason magnetic fields are used to confine hot plasma). Hope this helped :)
<h2>Replication </h2>
Explanation:
Meselson and Stahl began the experiment by growing E. coli in medium, or nutrient broth, containing a "heavy" isotope of nitrogen
When grown on medium containing heavy nitrogen the bacteria took up the nitrogen and used it to synthesize new biological molecules including DNA
After many generations growing in the heavy nitrogen, the nitrogenous bases of the bacteria's DNA were all labeled with heavy nitrogen and then the bacteria were switched to bacteria containing a light nitrogen and allowed to grow for several generations
They then measured the density of the DNA using density gradient centrifugation
Results obtained contained heavy DNA,Light DNA and hybrid of Light and heavy DNA
The experiment done by Meselson and Stahl demonstrated that DNA replicated semi-conservatively, meaning that each strand in a DNA molecule serves as a template for synthesis of a new, complementary strand
Had it been conservative mode of replication, DNA replication would have resulted in one molecule consisting of both original DNA strands (identical to the original DNA molecule) and another molecule consisting of two new strands (with exactly the same sequences as the original molecule)
