Genetic Data from Fossils and Living Groups of People Tell

question 33

Multiple Choice

Genetic data from fossils and living groups of people tell us that

• A) modern humans evolved in Africa between 200 and 400 ka and all modern humans outside of Africa are descended from an African population.
• B) one small population of modern people left Africa about 60 ka and first traveled along the southern coast of Asia and then into Eurasia.
• C) there was extensive interbreeding between modern human populations and other hominins that lived in Eurasia, such as the Neanderthals.
• D) modern humans migrated out of Africa to Europe first and then traveled east to Asia.

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Definitions:

Secondary Reinforcer

A stimulus that gains its reinforcing power through its association with a primary reinforcer.

Primary Reinforcer

A naturally reinforcing stimulus, such as food or water, that does not require learning to become desirable.

Partial Reinforcement Extinction Effect

A phenomenon where behaviors reinforced intermittently are more resistant to extinction than behaviors reinforced continuously.

Disequilibrium Principle

A concept in economics and game theory where participants' strategies are not in perfect balance, leading to changing strategies over time.