AP BIOLOGY

Detailed explanation-1: -New World monkeys have an additional premolar tooth in their mouths; they have three while Old World monkeys only have two (2). Old World monkeys have fingernails and toenails, while New World monkeys often have claws on all of their digits with the exception of the big toes of marmosets and tamarins (2, 3).

Detailed explanation-2: -Evidence from fossils, proteins and genetic studies indicates that humans and chimpanzees had a common ancestor millions of years ago.

Detailed explanation-3: -species change through time. What type of evidence for evolution would arise from a comparison of the DNA sequence of humans and monkeys? DNA base sequences and amino acid sequences of proteins are compared in biochemical evidence for evolution.

Detailed explanation-4: -These three species look alike in many ways, both in body and behavior. But for a clear understanding of how closely they are related, scientists compare their DNA, an essential molecule that’s the instruction manual for building each species.