A "Mystery" in Our Understanding of Plate Tectonics Has Been

question 25

Multiple Choice

A "mystery" in our understanding of plate tectonics has been, until recently, the nature of the power source capable of moving the plates and the continents embedded within them. Recent evidence indicates the power source to be ____.

• A)the readjustment of the surface to continual shrinking of the whole Earth
• B)convection currents within Earth's mantle is moving the plates
• C)the action of ocean currents is dragging along the seafloor, causing the seafloor and the continents to move
• D)the continual vibration from earthquakes and volcanoes slowly moves the continents equator-ward under the influence of centrifugal force

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Definitions:

Natural Selection

The process by which organisms that are better adapted to their environment tend to survive and produce more offspring.

Bitter-Tasting Foods

Refers to edible substances that have a sharp, pungent flavor often perceived as unpleasant, which can vary based on genetic makeup and cultural preferences.

Genetically Predisposed

A condition where an individual has a higher likelihood of developing certain traits or diseases due to their genetic composition.

Epigenetics

Inquiry into the effects of gene expression modification on organisms, excluding alterations to the DNA sequence.