Question

Physical Antrhopology

Which types of social organizations in primates are characterized by sexual dimorphism? Choose all correct.

a) polygynous (one male, multiple females)

b) multi-male, multi-female

c) monogamous

When did modern human and Neandertal interbreeding most likely occur?

a) 80 – 50 kya

b) 200 – 225 kya

c) 100 – 130kya

What is the shared, derived characteristic of the hominins?

a) bipedalism

b) tool use

c) suspensory morphology in the shoulder

d) tool making

When did modern human and Neandertal interbreeding most likely occur?

a) 80 – 50 kya

b) 200 – 225 kya

c) 100 – 130kya

Answer 1

1. Recognized systems include monogamy, polygamy (which includes polygyny, polyandry, and polygynandry), and promiscuity, all of which lead to different mate choice outcomes and thus these systems affect how sexual selection works in the species which practice them. Therefore, the correct answer is (a) and (c).

2. (a) 80-50 kya. Neanderthals were our closest evolutionary relatives. Their ancestors left Africa before modern humans, venturing into Europe as far back as 500,000 years ago, and were still there when our ancestors embarked on the same journey about 70,000 years ago.

3. Hominids are bipedal and have big brains. They have several skeletal adaptations to walking upright, such as curved vertebrae and angled femurs. Hominids became omnivores and developing cooking, which helped make their teeth and jaws smaller. The handyman, Homo habilis lived around 2.33 to 1.44 million years ago. Therefore, the correct answer is (a).

4. (a) 80-50 kya. Neanderthals were our closest evolutionary relatives. Their ancestors left Africa before modern humans, venturing into Europe as far back as 500,000 years ago, and were still there when our ancestors embarked on the same journey about 70,000 years ago.