The answer should be C, the heart and the blood vessels.
The heart acts as a pump in the circulatory system. It pumps blood to organs and tissues all around the body. Meanwhile, the blood vessels (arteries, veins, and capillaries) help transport the blood to tissue and cells and back to the heart. Each type of blood vessel has their own function.
The brain is not involved in this system, as the whole circulation process does not require any us to make any decision.
In addition, there's also one structure that is in the blood vessels, but technically not another item for the circulatory system. That's valves, they are like flaps that ensure blood flowing in one wag direction and to prevent the back flow of blood.
So, the answer is C.
This region of the antibody is called the Fab (fragment, antigen-binding) region. It is composed of one constant and one variable domain from each heavy and light chain of the antibody. The paratope is shaped<span> at the</span>amino<span> terminal end of the antibody monomer by the variable domains from the heavy and light chains.
</span><span>https://en.wikipedia.org/wiki/Antibody</span>
Answer: They store energy because they may need it for winter. Take pine trees for example. They are fine through the winter because they have stored enough energy to keep their leaves. this works with regular trees to. The reason why trees don’t die in winter is because they store energy to last.
Explanation: Plants can’t use photosynthesis without light
Answer:
Plant cells have a large central vacuole that takes up most of the cell’s space, and animal cells have many smaller vacuoles.
Explanation:
Plant cells are characterized by the presence of large vacuoles present in the center of the cell. The vacuole is large enough to occupy as much as 90% volume of the plant cell.
On the other hand, animal cells have a centrally located nucleus. They do not have large vacuole. Rather, animal cells have many smaller vacuoles that are present near the periphery of the cell.
Answer:
C. The DNA fragments travel at different speeds through the gel.