Also see eutrophic lake and mesotrophic lake . Omnivore Heterotrophic organism that can use both plants and other animals as a source of food. Also see carnivore and herbivore . That part of the ocean that extends from the continental shelf . Compare with coastal zone .
Open System Is a system where both matter and energy can cross the boundary of the system.
Most environmental systems are open. The level of an abiotic factor or condition in the environment within the tolerance range at which a species or population can function most efficiently or with the greatest positive effect to its physiological or reproductive fitness. Ore Material extracted from the Earth's lithosphere that yields metallic minerals . Organ Group of cells and tissues that have a particular function for an organism. Organelle Is a specialized structure found in cells that carry out distinct cellular functions.