All of the following statements about the nitrogen cycle are incorrect, except which?
assimilation is the process by which plants absorb and use nitrates.
nitrogen fixation is prevented by the presence of ammonium in the soil.
denitrification occurs when there’s a shortfall of available nitrogen in the soil.
the nitrogen cycle works best when bacteria are eliminated from the process.

It’s not number 3 or 4, Denitrification occurs when there’s a shortfall of available nitrogen in the soil. Or The nitrogen cycle works best when bacteria are eliminated from the process. I think its Number 1 or Assimilation is the process by which plants absorb and use nitrates.

Explanation:

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).