Mononucleosis, commonly called mono, is an illness caused by the Epstein-Barr virus. Although it's rarely serious, mono can cause bothersome symptoms that last several weeks.
Complex systems. Complex systems present problems both in mathematical modelling and philosophical foundations. The study of complex systems is an approach to science that investigates how relationships between parts give rise to the collective behaviors of a system and how the system interacts and forms relationships with its environment.
Ecosystem science is the study of inter-relationships among the living organisms, physical features, bio-chemical processes, natural phenomena, and human activities in ecological communities. Within any given area, living and nonliving interact with each other. Together, these things form an ecosystem.Because all of the elements within an ecosystem are interrelated, these systems can be quite complex. All ecosystems must maintain a delicate balance between all of their members in order to thrive.ithin any given area, living and nonliving interact with each other. Together, these things form an ecosystem. Because all of the elements within an ecosystem are interrelated, these systems can be quite complex.