<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.
<span>the one that is nor released by trees into the atmosphere is : Ozone
Ozone is the layer beneath the atmosphere that protected us from the harm of direct sunlight.
Ozone is already exist within the earth and not created by organisms. We only produce the substance that potentially destroy it</span>
Answer:
Photosynthesis is the process where green plants synthesis energy using the energy of the sun, carbon dioxide and water. Photosynthesis is very important to life it keeps most plants alive (autotrophs), and heterotrophs eat autotrophs to help them het energy. An autotroph is an organism that synthesis its own energy and heterotroph is an organism that gets it energy by digesting other organisms.
Answer:
I think its the frontal lobe of the brain
