Both H Habilis and H

question 13

Multiple Choice

Both H. habilis and H. rudolfensis display a diverse combination of

• A) tool-making skills
• B) linguistic abilities
• C) ancestral and derived characteristics
• D) morphological adaptations to climate changes

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Definitions:

Experimental Group

The participants in an experiment who receive the drug or other treatment under study—that is, those who are exposed to the change that the independent variable represents.

Placebo Effect

A phenomenon in which a person experiences a physiological or psychological improvement after being given a treatment with no therapeutic value.

Anxiety Disorder

A category of mental health diagnoses that lead to excessive nervousness, fear, apprehension, and worry.

Independent Variable

The variable in an experiment that is manipulated to see if it causes an effect on some other variable.