When two plates carrying oceanic crust collides, islands and volcanoes are formed.
When two plates carrying continental crust collide, it makes mountain ranges and valleys.
When a plate carrying oceanic crust collided with a plate carrying continental crust collides, the oceanic plate subsides under the continental one due to the density of the two, and makes trenches and mid-ocean ridges.
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The International System of Units (SI) is originated in France by frenches and originally was called a metric system of measurements. It provides definitions of various units of measurement such as weight, distance, electric current, temperature, and others which is widely accepted in the different fields of science and technology.
It is the system that is extended and derived from the french metric system of measurement is accepted in 1960 by convention 44 nation of the world to use particular unit of measurement worldwide to avoid confusion.
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Actually, many single-celled organisms have a structure that facilitates mobility within the cell's environment. These often take the form of flagella, thin structures that emanate from the cell wall and push into the outer environment
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