AP BIOLOGY

Detailed explanation-1: -Molecular similarities provide evidence for the shared ancestry of life. DNA sequence comparisons can show how different species are related.

Detailed explanation-2: -By comparing DNA of different organisms it’s possible to document genetic change over time. Counting the number of nucleotide differences between species, in a segment of DNA, provides information on how long ago these species diverged from a common ancestor.

Detailed explanation-3: -Five types of evidence for evolution are discussed in this section: ancient organism remains, fossil layers, similarities among organisms alive today, similarities in DNA, and similarities of embryos.

Detailed explanation-4: -Arguably, some of the best evidence of evolution comes from examining the molecules and DNA found in all living things. Beginning in the 1940s, scientists studying molecules and DNA have confirmed conclusions about evolution drawn from other forms of evidence.