True because <span>In ecology, a niche is a term describing the relational position of a species or population in its ecosystem to each other
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Answer:
Photon radiation
A high-energy photon beam is by far the most common form of radiation used for cancer treatment. It is the same type of radiation that is used in x-ray machines, and comes from a radioactive source such as cobalt, cesium, or a machine called a linear accelerator (linac, for short).
The speed of radioactive particles is also an important factor in medical use. Beta particles travel very fast. This, combined with their small size, gives them significant penetrating power. In cancer treatment, for example, beams of beta particles can be created outside the patient's body and directed at tumors.
In population genetics, gene flow (also known as gene migration or allele flow) is the transfer of genetic variation from one population to another. ... In some cases migration may also result in the addition of novel genetic variants to the gene pool of a species or population.
