Examlex
Hard water results from relatively high concentrations of dissolved ________.
Bear
A large mammal belonging to the family Ursidae, known for its thick fur and large body, with species spread across the northern hemisphere.
Producer
An organism, typically a plant or algae, that synthesizes organic compounds from simple substances like carbon dioxide, serving as a fundamental part of the food chain by providing energy for consumers.
Nitrogen
A chemical element with symbol N and atomic number 7, essential for all living organisms.
Denitrification
Conversion of nitrates or nitrites to nitrogen gas.
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