Each tectonic plate is free-floating and can move independently. Earthquakes and volcanoes are the direct result of the movement of tectonic plates at fault lines. The term fault is used to describe the boundary between tectonic plates. Most of the earthquakes and volcanoes around the Pacific ocean basin—a pattern known as the “ring of fire”—are due to the movement of tectonic plates in this region. Other observable results of short-term plate movement include the gradual widening of the Great Rift lakes in eastern Africa and the rising of the Himalayan Mountain range. The motion of plates can be described in four general patterns.
When tectonic plates collide can form mountain ranges or large mountains, for example, the Himalayas is formed from the collision of two plates. On the other hand when there is subduction (an oceanic plate sinks under the continental plate) mountainous systems are also formed, the lower plate melts and generates volcanic eruptions such as those that form some of the Andes mountains in South America. Finally, deep depressions such as the Great Rift Valley are formed on land where plates are separated
<h3>The lytic cycle and the lysogenic cycle are means of viral replication. This takes place within the host cell and the virus takes control of the host cell and controls its cellular mechanism to reproduce itself.</h3>
