AP BIOLOGY

Detailed explanation-1: -Hence, the correct answer is ‘Wrists that bend backwards’.

Detailed explanation-2: -The primates exhibit specific characteristics that distinguish them from less developed mammals. They include arboreal adaptation, big brains, heightened sense of vision, opposable thumbs, more flexibility in shoulder movements. The most commonly found species of primates are monkeys, apes, Gorillas.

Detailed explanation-3: -Explanation: Characteristics of all primates include four limbs, collarbones, a high degree of mobility in their shoulders, forward facing eyes, relatively dexterous hands, and a high degree of intelligence.