Which of the following is less subject to degradation than is chromosomal DNA and is used as an evolutionary time clock?

Question

Quizplus · Accepted Answer

Mitochondrial DNA is less subject to degradation than chromosomal DNA because it is located in the mitochondria, which are protected by multiple barriers. Additionally, mitochondrial DNA is used as an evolutionary time clock because it accumulates mutations at a relatively constant rate over time, making it a useful tool for determining the evolutionary relationships among different organisms. Chloroplast DNA is also used as an evolutionary time clock, but it is not as well conserved as mitochondrial DNA. rRNA and mRNA are not as useful for evolutionary studies because they are much more prone to degradation than DNA.

Which of the Following Is Less Subject to Degradation Than