In humans, the sound is produced by the ________.
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When large quantities of ___ are consumed, it tends to slow metabolic processes and to depress the central nervous system.
Cinnabar is an ore/mineral of
___ is amphoteric in nature.
Plant tissues are of how many types?
Opportunity costs exist because
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Which of the following statement(s) is/are INCORRECT regarding Phosphorus?
Myopia is a defect of eyes which is also known as