Answer:
examination of data from a number of independent studies of the same subject, in order to determine overall trends.
No system is closed off by it surroundings.
Metabolism
Metabolism is a body function which enables a cell to process and create needed organic compounds that will be used for cell processes like repairing, rejuvenating and energy.
Ecology, genetics and evolution are themes, subdisciplines and subtopics of biology -the study of life.