Which of the following describes the process of adaptive radiation?

random changes occur in the genes or chromosomes of an orgnism.

organisms move from one location to another without returning.

organisms are separated from members of their species by rivers or mountains.

a species changes to fill many niches in an area.

Transposon can cause mutations in genes at or near the site of transposon insertion. it is possible for these elements to transpose away from their original site, causing a reversion of the mutant phenotype. in some cases, however, even more severe phenotypes appear when these elements excise from this site, due to events at or near the mutant allele. what might be happening to the transposon or the nearby gene to create more severe mutations?