Evolutionary theory predicts that related organisms will share similarities that are derived from common ancestors. Which of the following CANNOT be concluded from
the fossil evidence?
A) Evidence of every species that has ever existed
B) Links between groups leading to various modern species
C) The chronological sequence in which different organisms first appeared.
D) Relation through common descent from older organisms

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?