Answer:
The correct option is: C. pump blood with greater pressure
Explanation:
The human heart is a muscular organ, present between the middle compartment of the chest and the lungs. Heart is responsible for pumping blood through blood vessels of the circulatory system. It is divided in the following four chambers: the right atria, left atria, right ventricle and left ventricle.
The wall of the left ventricle is thicker as compared to the wall of the right ventricle. This is because <u>greater force is required to pump the blood to the entire body.</u>
<span>Cells control cell division in order to maintain normal cell function. If something happens to the control of the cell division, the healthy cells will divide uncontrollably. These new cells are cancer cells. </span>
The mutations in three genes are responsible for development of cancers:
1. Mutation in proto-oncogenes. Proto-oncogenes normally signal cells to grow and differentiate. Proto-oncogenes can become oncogenes due to mutations which result in the uncontrollable division of the cells.
2. Mutation in tumor suppressor genes. In normal cells, tumor suppressor genes suppress genes essential for cell cycle and that way they prevent uncontrollable cell division. However, after a mutation in these genes, suppression is lost and the cell may progress to cancer.
3. Mutation in stability genes. In normal cells, they have no role either in cell death or growth, but they control mutation rate. Mutation in stability genes results in situation where all genes, including proto-oncogenes and tumor suppression genes, are more frequently mutated.
A particle that has 14 protons, 14 neutrons, and 14 electrons
IT's the powerhouse of the cell :)
The answer is <span>about 10 percent of the energy available within one trophic level is transferred to organisms at the next trophic level.</span>
