DNA mutations cause cancer or an inability for proper function of the immune system.
Explanation:
DNA is our blueprint, so if something is wrong on the blueprint, then our body will "collapse" like a building (well not always). Let's say, the gene for immune system function is mutated and comes out wrong. That person might not be able to make white blood cells which fight off sickness. Other mutations can also cause cancer, which is a really bad form of sickness.
The correct answer to this question is this one: a.) bottleneck effect. Increased poaching nearly led to the extinction of the American bison. The kind of effect that does this example represent is called the bottleneck effect. Hope this helps answer your question.
<span>"I need to stay out of sun."
Fluphenazine is an anti-psychotic drug that can cause photosensitive and sunburn. clients taking this drug don't need to increase fluid intake, avoid cheese or eggs, or plan rest periods.</span>
