Question

the evolution of human beings
a family tree
homininae
hominini gorillini
human chimpanzee gorilla
according to the scientists, the dna of chimpanzees and human beings is almost identical, with a difference of only one percent.
a. human beings are not descendants of chimpanzees and gorillas.
b. humans and chimpanzees have a common ancestor
c. chimpanzees and gorillas enjoy having human contact
d. gorillas are more closely related to humans than to chimpanzees

Explanation:

The family - tree shows the evolutionary relationship among humans, chimpanzees, and gorillas. The close DNA similarity between chimpanzees and humans indicates they share a common ancestor. Option A is incorrect as the tree doesn't imply a direct descendant - relationship in that way. Option C is not supported by the given information about the family - tree and DNA similarity. Option D is wrong since the text only mentions the DNA similarity between chimpanzees and humans, not a comparison between gorillas' relation to humans and chimpanzees.

Answer:

B. Humans and chimpanzees have a common ancestor