Answer:
Most treatments for cancer use radiation to target the cancerous cells (tumor) and blast radiation in that direction. Because we cannot control the radius of the radiation, other cells are also blasted with radiation and causes sickness in cancer patients.
Explanation:
Cyanobacteria which is a type of algae. It conducts photosynthesis and without it there may not have been life today because they didn't need oxygen to survive and in order to have oxygen there had to have been some form of life...
The answer is the first one ( True )