Which of the Five Common Ancestors,labeled V-Z,has Given Rise to the Greatest

question 34

Multiple Choice

Which of the five common ancestors,labeled V-Z,has given rise to the greatest number of species,both extant and extinct?

• A)V
• B)W
• C)Both W and Z can be considered to have given rise to the greatest number of extant and extinct species.
• D)Both X and Y can be considered to have given rise to the greatest number of extant and extinct species.

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Definitions:

Thin Lava Flows

Layers of lava that spread out over large areas and cool to form relatively thin sheets of rock.

Lava Fountain

A volcanic phenomenon in which molten lava is forcefully ejected into the air from a vent or crack in the Earth's surface.

Pyroclastic Flow

A rapid flow of hot gases and volcanic debris that descends along a volcano's slopes when there's a violent eruption.

Lava Dome

A roughly circular mound-shaped protrusion resulting from the slow extrusion of viscous lava from a volcano.