Which level of organization is characterized by a group of cells that work together to perform a common function? organ
tissue
organ system
organism
A lion eating a zebra is an example of which characteristic of life?
having cells
responding to the environment
using energy
growing and developing

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?