Which statement is true about Earth's poles? A. Only the north magnetic and geographic poles wander.
B. Only the magnetic poles wander
C. The geographic poles both wander
D. The magnetic poles stay in the same place.

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

1. which of the following transport mechanisms utilizes energy? a. osmosis b. diffusion c. facilitated diffusion d. endocytosis

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?