Use the following figure to answer the questions below. Humans,chimpanzees,gorillas,and orangutans are members of a clade called the great apes,which shared a common ancestor about 18 million years ago.Gibbons and siamangs comprise a clade called the lesser apes.Tree-branch lengths indicate elapsed time. -Together,the lesser apes and great apes shared a common ancestor most recently with other members of their