The Probability of Finding Life in Any Subsurface Ocean Beneath

question 14

Multiple Choice

The probability of finding life in any subsurface ocean beneath the surface of Ganymede is much lower than for Europa because

• A) its icy crust will be much thicker, making it much more difficult for nutrients to be transported from the surface
• B) it does not have a rock/water boundary at its ocean bottom
• C) there is less tidal heating
• D) of all of these

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Definitions:

Evolution

The process by which different kinds of living organisms are thought to have developed and diversified from earlier forms during the history of the earth.

Allele

A variant form of a gene at a particular location on a chromosome that controls a specific trait.

Genotype

The genetic makeup of an organism, determining inherited characteristics.

Phenotype

The set of observable characteristics of an individual resulting from the interaction of its genotype with the environment.