Answer:
B
Explanation:
We have learned of a major population crisis in China. Whereas The united states of America has the slowest population growth.
Thymine and cytosine are classified as "Pyrimidines" and have one ring of carbon and nitrogen atoms for each base.
The answer you are looking for is:<span>capillary beds</span>
Doctors inject medicines in veins because veins are more accessible and donot have high pressure due to which there is no risk of blood backing up with into the infused fluid.
However there are some cases when medicine is injected in artery but a lot of precautions needs to be taken while doing so.
