If There Are Other Civilizations at Present in the Milky

question 108

Multiple Choice

If there are other civilizations at present in the Milky Way Galaxy,which statement is almost undoubtedly true?

• A)They are far more technologically advanced than we are.
• B)They are anatomically much like us,with two arms,two legs,two eyes,and two ears.
• C)They have social structures that are completely different from our own;for example,different types of "family" units,and so on.
• D)For fun,they enjoy "buzzing" to Earth and temporarily abducting people,showing a clear preference for people located in less-developed rural areas.

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Definitions:

Synapomorphies

Shared derived characteristics or traits that are used to establish evolutionary relationships among species or groups.

Common Ancestor

The most recent individual from which all organisms in a group are directly descended.

Phylogenetic Systematics

A method of classifying organisms based on their evolutionary relationships, utilizing genetic, morphological, and other data to infer a "family tree" of life.

Dinosaur Genera

Categories in the classification of dinosaurs, where each genus comprises one or more species that are closely related.