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Which best defines nitrogen fixation?
the process of creating free nitrogen for plants to absorb
the breakdown of nitrogen in the soil
the conversion of nitrogen gas into a usable form
the destruction of the bonds between nitrogen and other elements

Which are examples of how technology has advanced scientific understanding.1using hot water to sterilize medical equipment.2transplanting a human organ into another individual.3inserting genes from one sheep into another cell to make a cloneunderstanding the different structures that make up a cell.4examining microorganisms from the deepest parts of the ocean

The kw for water at 0 °c is 0.12× 10–14 m2. calculate the ph of a neutral aqueous solution at 0 °c.

If a particle has z = 25 and 23 electrons, what is its charge?