Concept explainers
Introduction: Primates, the group containing all species commonly related to lemurs, monkeys, and apes, are members of the biological order, and the latter category includes human beings.
Answer to Problem 1SQ
Correct answer: d. Rigidly connected, identical vertebrae in the backbone.
Explanation of Solution
Reason for the correct answer:
The species that live in and locomotes through the trees are referred to as arboreal adaptation. The primates have the characteristics of arboreal adaptations. The primates have immense diversity and they possess a distinctive body trunk. There are about five functional distinct types of vertebrae in the backbone of primates. The characteristic that is not shared by most of the primates is rigidly connected, identical vertebrae in the backbone.
Option d. is given as “rigidly connected, identical vertebrae in the backbone”.
Hence, the correct answer is option d.
Reasons for incorrect answers:
Option a. is given as “mobile joints, connecting bones of the shoulders, limbs, hands, and feet”.
Mobile joints, connecting bones of the shoulders, limb, hands, and feet are the characteristic features of the primates that make them good at living in trees. Therefore, option a is incorrect.
Option b. is given as “an opposable thumb and often an opposable big toe”.
The opposable thumb and big toe feature is the feature of primates that helps in arboreal adaptation shared by most of the primates. Therefore, option b is incorrect.
Option c. is given as “dermal ridges and flat nails on fingertips”.
The feature of dermal ridges and flat nails on the fingertips is shared by most of the primates in an arboreal adaptation. Therefore, option c is incorrect.
Hence, options a., b., and c. are incorrect.
The characteristic that is not an arboreal adaptation shared by most of the primates is provided.
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Chapter 6 Solutions
Our Origins: Discovering Physical Anthropology (Fourth Edition)
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