Which statement about genome evolution is true?

Question

Quizplus · Accepted Answer

The statement that some salamanders have about 40 times as much DNA as humans do is true. This is due to the accumulation of repetitive DNA sequences in their genome, which contributes to genome size without necessarily increasing complexity.

Answer: C
 The statement that most eukaryotes have only a little noncoding DNA is generally true. While some organisms (such as salamanders) have large amounts of noncoding DNA, the majority of eukaryotes have a smaller proportion of their genome dedicated to noncoding regions.

Answer: E
 The statement that most of the variation in genome size is due to the number of functional genes an organism has is false. While functional genes do contribute to genome size, much of the variation can also be attributed to the presence of noncoding regions, such as repetitive DNA sequences. Additionally, some organisms have lost or duplicated genes, which can also affect genome size.

Which Statement About Genome Evolution Is True