Answer:
most forms of cancer are caused by somatic mutations
Explanation:
<span>If I were attempting to date a rock sample that I suspect to be incredibly old, i would use radioactive isotopes with a long half life. When dating rocks and fossils to discover approximately how old they are, radioisotope dating is used on igneous rocks found near fossils. Things like Uranium 235, which is an unstable radioactive isotope of elements, decays at a constant rate over time so can be useful in determining age.</span>
Methane the most, small amount of oxygen and other gases
Neurons pumping out the cells of potassium into the cells meaning energy is being transfer
The respiratory system contains the lungs, so the answer is C. Hope this helps.
