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Mitochondria are organelles which are present in all cells. They are the sites for cellular respiration which provides an organism with energy.

preceded by interphase - DNA is being replicated and the two identical copies remain joined at centromere.-prophase - visible chromosomes and centrioles move to opposite poles spindle fibres develop, nucl...

During inspiration the diaphragm contracts and flattens and the external intercostal muscles contract. This moves the rib cage up and out and increases the volume of the thorax. This reduces the pressure ...

The "passato prossimo" refers to events that are completed, but have some relation to the present.  Events which happened long ago can still be expressed in this tense when the event is seen as ...

Modernising the Soviet Union was important for a number of reasons, primarily the need to prove communism was a viable and strong form of government in the eyes of the Western world. As the first nation t...