The answer to this is the nucleus
The correct answer is b: cattle on rangeland. A point source of pollution occurs from a single identifiable and usually spatially narrow source. These sources of pollution are usually relatively easily to quantify and manage. In contrast, a non-point source of pollution, such as cattle on rangeland or irrigated agriculture, is variable on both spatial and temporal scales. These sources of pollution are difficult to quantify and manage.
Answer:
A
Explanation:
These are small consecutive repetitive sections of the DNA – mostly between 5 – 50 times repetitions. They are not part of coding regions (genes) and therefore are prone to non-lethal mutations of DNA. They are therefore very variable between individuals and can be used for DNA forensic identification.
