Scientists Are Now Targeting Europa,one of Jupiter's Moons,as a Likely

question 17

Multiple Choice

Scientists are now targeting Europa,one of Jupiter's moons,as a likely site to search for elementary life forms because

• A) radio signals that follow a recognizable pattern have been detected from this moon.
• B) there is strong evidence for liquid water beneath the thick ice layer on its surface.
• C) changes have been seen in the dark lines crossing the icy surface which have a spectral signature of vegetation.
• D) there appears to be large amounts of dark organic material spread on its surface.

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Definitions:

Has-a

A relationship in object-oriented programming where one class contains a reference to another, indicating a posession or usage relationship.

Dynamic Events

Actions or occurrences that are generated based on user interaction or system triggers in a software application.

Button

A graphical user interface element that can be clicked to perform a specific action.

Simple Container

An object used to store a collection of other objects.