Final answer:
From the list provided, the baboon is not considered a great ape; it's an Old World monkey and is part of the ceropithecoids category.
Step-by-step explanation:
The organisms that belong to the great apes in the biological family Hominidae are humans, chimpanzees, gorillas, and orangutans. These species share a range of characteristics, such as having more than 97% of DNA in common and having the capacity to develop language and culture. Among the list of organisms provided in the question, the baboon is not considered a great ape because it falls under the category of ceropithecoids, which are the Old World monkeys of Africa and southern Asia.