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.

There are three main types of mutation present for DNA. They are substitution, insertion and deletion. Substitution is the exchange of one base for another. Insertion happens where extra base pairs are inserted. Deletions are mutations where a section of DNA is lost. Therefore, the correct answer is substitution.

It allows water to resist freezing and thawing cycle.

According to edgenuity, the answer is c.