Among the Pre-4-Mya Fossils That Some Paleoanthropologists Include in the Hominin

question 61

Multiple Choice

Among the pre-4-mya fossils that some paleoanthropologists include in the hominin family, ________ is thought to be a biped based on information from a single toe bone.

• A) Sahelanthropus tchadensis
• B) Ardipithecus kadabba
• C) Orrorin tugenensis
• D) Ardipithecus ramidus

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Definitions:

Primary Drive

Fundamental biological needs or urges, such as hunger, thirst, and sex, that motivate behavior.

Unlearned

Refers to behaviors or responses that are natural or inherent, not acquired or taught.

Learned

Acquired or developed as a result of experience, education, or training.

Homeostasis

The regulatory process by which biological systems tend to maintain stability while adjusting to conditions that are optimal for survival.