To refer to class variables and methods, you join the class's name and the name of the class method or class variable together with a period ('.'). Methods and variables that are not class methods or class variables are known as instance methods and instance variables.nstance Methods and Variables. While System's. When the System class is loaded into the application, the class instantiates PrintStream and assigns the new PrintStream object to the. As you see, you refer to an object's instance methods and variables similar to the way you refer class methods and variables.
Mitochondria (singular mitochondrion) are abundant organelles present in nearly all eukaryotic cells . The main function of mitochondria is to produce adenosine triphosphate (ATP), the cellular energy source. Mitochondria are believed to be the evolutionary result of early anaerobic (nonoxygen-using) eukaryotic cells engulfing aerobic (oxygen-utilizing) bacteria, resulting in a symbiotic relationship between the two organisms.
The mitochondrion (plural mitochondria) is a double membrane-bound organelle found in all eukaryotic organisms. Some cells in some multicellular organisms may however lack them (for example, mature mammalian red blood cells).