The Following Questions Refer to the Description and Figure Below

question 73

Multiple Choice

The following questions refer to the description and figure below.
The figure represents a cross section of the sea floor through a mid-ocean rift valley, with alternating patches of black and white indicating sea floor with reversed magnetic polarities. At the arrow labeled "I" (the rift valley) , the igneous rock of the sea floor is so young that it can be accurately dated using carbon-14 dating. At the arrow labeled "III," however, the igneous rock is about 1 million years old, and potassium-40 dating is typically used to date such rocks. NOTE: the dashed horizontal arrows indicate the direction of sea-floor spreading, away from the rift valley.
Figure 25.1
-Which event is nearest in time to the end of the period known as snowball Earth?

• A)oxygenation of Earth's seas and atmosphere
• B)evolution of mitochondria
• C)Cambrian explosion
• D)evolution of True multicellularity
• E)Permian extinction

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Definitions:

Production Possibilities Curve

A graphical representation showing the maximum combination of goods and services that can be produced from a fixed set of resources.

Bowed Outward

A description of a production possibility frontier that demonstrates the increasing opportunity cost of producing one good over another.

Opportunity Cost

The cost of forgoing the next best alternative when making a decision or choosing to invest in one option over others.

Rectangles

A four-sided flat shape where every angle is a right angle and opposite sides are parallel and equal in length.