Which of the Rock Layers in This Figure Was Most

question 3

Multiple Choice

Which of the rock layers in this figure was most likely deposited by sand dunes on land?

• A) the reddish breccia
• B) the upper tan sandstone
• C) the lower tan sandstone
• D) the lowest red sandstone
• E) none of these

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Definitions:

Free-Running Rhythm

Rhythm of the body’s own devising in the absence of all external cues.

Zeitgeber

Environmental event that entrains biological rhythms; German for “time giver.”

Entrained

The synchronization of an organism's circadian rhythms to that of an external rhythm in its environment.

Biological Rhythms

Natural cycles of physical, mental, and behavioral changes that follow a periodic, predictable pattern, such as circadian rhythms or menstrual cycles.