Fossils of Au. Afarensis Are Particularly Significant Because

question 30

Multiple Choice

Fossils of Au. afarensis are particularly significant because

• A) Au. afarensis remains are the oldest to be found in association with evidence of both stone tools and fire use.
• B) they show that the gracile australopiths were not hominins after all.
• C) they are the oldest hominin fossils yet found in the New World.
• D) they comprise the first fossil evidence to confirm that bipedalism preceded the evolution of a humanlike brain.
• E) they show that humans evolved in Asia rather than Africa.

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Definitions:

Life Expectancy

An average estimate of the number of years a person or organism is expected to live, based on statistical analyses of age-specific mortality rates.

Regression Model

A statistical model that analyzes the relationship between a dependent variable and one or more independent variables.

Missing Results

Instances where data or outcomes that were expected in a research or analysis are not available or have not been recorded.

Significance Level

The probability of rejecting the null hypothesis in a statistical test when it is actually true, typically denoted by alpha (α) and used as a threshold for statistical significance.