passwella.
Menu

WAEC Biology 2013 Question 39

Question 39

Nutrient Cycling

The bacteria that reduce nitrates in the soil into gaseous nitrogen are referred to as

  1. A.nitrifying bacteria.
  2. B.denitrifying bacteria.
  3. C.putrefying bacteria.
  4. D.saprophytic bacteria.
Show the answer and explanation

Answer: B (denitrifying bacteria.)

Explanation

Denitrifying bacteria (common in waterlogged soil) break nitrates down to nitrogen gas, which escapes to the air.