The Following Questions Refer to the Evolutionary Tree in Figure

question 51

Multiple Choice

The following questions refer to the evolutionary tree in Figure 22.2.
The tree's horizontal axis is a timeline that extends from 100,000 years ago to the present; the vertical axis represents nothing in particular. The labeled branch points on the tree (V-Z) represent various common ancestors. Let's say that only since 50,000 years ago has there been enough variation between the lineages depicted here to separate them into distinct species, and only the tips of the lineages on this tree represent distinct species.


-Evolutionary trees such as this are properly understood by scientists to be

• A)theories.
• B)hypotheses.
• C)laws.
• D)dogmas.
• E)facts.

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Definitions:

DNA

Deoxyribonucleic acid, a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all living organisms and many viruses.

SOC Code

An acronym for Standard Occupational Classification code, which is a system used to classify workers into occupational categories for the purpose of collecting, calculating, or disseminating data.

Major Group

A classification system used to group similar occupations or academic fields for organizational or analytical purposes.

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Basic requirements that are universal to all humans, including physiological needs, safety, love/belonging, esteem, and self-actualization.