Amicrobiologist observed the genetic sequence of dna change from

tac gca tgg aat
aug cgu acc uua
to
tac gta tgg aat
aug cau acc uua.

name the kind of mutation that occurred.

insertion
deletion
substitution

evidence and logical support is essential for a scientist to do in order to maintain credibility. this is because no one can believe without any logic and without any evidence.hence a scientist can maintain credibility by proving himself and by answering logically so experiments prove very beneficial. logical hypothesis give conclusion which is acceptable. therefore, there are two main factors to maintain credibility by a scientist is evidence and logical support.

links? do you have a link? i don't see anything?