Examlex
The major work of the urinary system is performed by the:
Level of Organization
Describes the hierarchy in biology from the atomic and molecular scale up through cells, tissues, organs, organisms, populations, communities, ecosystems, and the biosphere.
Ecosystem
A community of interacting organisms and their physical environment, interconnected through nutrient cycles and energy flows.
Cycling of Energy
The process by which energy is transformed and transferred among organisms and their environment.
Flow of Matter
The movement and cycling of chemical elements and compounds in different forms across various components of the Earth's ecosystem.
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