Question

Which is the most inclusive (most general) group, all of whose members have fully opposable thumbs?

A) hominoids
B) Homo
C) anthropoids
D) hominids
E) primates

Answer 1

Option C). The most inclusive group with fully opposable thumbs is anthropoids, which encompasses monkeys, lesser apes, and great apes.

Step-by-step explanation:

Anthropoids (option C) are the most inclusive (general) group, with every member having fully opposable thumbs. Monkeys, lesser and great apes, including humans, chimpanzees, bonobos, gorillas, and orangutans, are included in this group. All great apes, including humans, are referred to as hominids, though not all of them have fully opposable thumbs as some anthropoid groups do. In addition, humans and great apes are classified as hominoids; however, the term "hominoidea" is even more restricted, referring only to humans and their progenitors after they split from chimpanzees.