What Have Researchers Learned by Looking at the Molars and Other

question 32

Multiple Choice

What have researchers learned by looking at the molars and other cranial features of H.erectus,such as a superorbital torus and an occipital bun?

• A) H. erectus was more dependent on tubers than earlier hominins.
• B) H. erectus was more dependent on hunting-and the lifestyle it demanded-than were earlier hominins.
• C) The chewing apparatus of H. erectus was essentially the same as that of H. habilis.
• D) The paucity of dental remains of H. erectus has made it difficult for researchers to say anything significant.
• E) H. erectus had yet to make the shift to hunting seen later on with Neandertals.

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Definitions:

Negative Reinforcer

A stimulus whose removal after a particular behavior increases the likelihood of that behavior occurring again in the future.

Pleasant Stimulus

A pleasant stimulus is any event, object, or situation that produces a positive emotional response or feeling of enjoyment.

Withdrawal

Symptoms that occur after cessation or reduction in intake of a substance that the body has become dependent upon, like drugs or alcohol.

Cognitive Processes

Mental activities involved in acquiring, processing, storing, and applying information, such as perception, memory, and reasoning.