AP BIOLOGY

Detailed explanation-1: -DNA and the genetic code reflect the shared ancestry of life. DNA comparisons can show how related species are. Biogeography. The global distribution of organisms and the unique features of island species reflect evolution and geological change.

Detailed explanation-2: -This process is called genetic drift. The difference between genetic drift and natural selection is that changes in allele frequency caused by genetic drift are random, rather than directional.

Detailed explanation-3: -Evolution is the process by which species adapt over time in response to their changing environment.

Detailed explanation-4: -The mechanism that Darwin proposed for evolution is natural selection. Because resources are limited in nature, organisms with heritable traits that favor survival and reproduction will tend to leave more offspring than their peers, causing the traits to increase in frequency over generations.