The Following Questions Refer to the Description and Figure Below

question 22

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
-On the basis of their morphologies, how might Linnaeus have classified the Hawaiian silverswords?

• A)He would have placed them all in the same species.
• B)He would have classified them the same way that modern botanists do.
• C)He would have placed them in more species than modern botanists do.
• D)He would have used evolutionary relatedness as the primary criterion for their classification.
• E)Both B and D are correct.

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Definitions:

Actively Erupting

A volcanic state characterized by ongoing expulsion of lava, ash, or other volcanic material.

Conical-Shaped Hill

A landform with a circular base and sloping sides that converge to a point at the top, resembling the shape of a cone.

Fresh Ash Layers

Recent deposits of volcanic ash, consisting of fine particles of volcanic glass, created during volcanic eruptions.

Flat-Topped Mesa

A broad, flat, elevated landform with steep sides, commonly found in arid and semi-arid regions.