Question

10. Choose the correct order of events in the nitrogen cycle
a. Nitrogen is in air, bacteria fix nitrogen, animals get nitrogen from plants, animals die and
decompose.
b. Animals die and decompose, animals get nitrogen from plants, nitrogen is in air, bacteria
fix nitrogen.
c. Bacteria fix nitrogen, nitrogen is in air, animals get nitrogen, animals die and decompose.
d. Nitrogen is in air, animals get nitrogen from plants, bacteria fix nitrogen, animals die and
decompose.

Answer 1

Answer:

In general, the nitrogen cycle has five steps:

Nitrogen fixation (N2 to NH3/ NH4+ or NO3-)

Nitrification (NH3 to NO3-)

Assimilation (Incorporation of NH3 and NO3- into biological tissues)

Ammonification (organic nitrogen compounds to NH3)

Denitrification(NO3- to N2)

Answer 2

The correct order of events in the nitrogen cycle is OPTION A as Nitrogen is in the air, bacteria fix nitrogen, animals get nitrogen from plants, animals die and decompose.

NITROGEN CYCLE -

• The cyclic process of conversion of atmospheric nitrogen to inorganic form consumable by plants.
• The nitrogen cycle involves nitrogen fixation, assimilation, ammonification, nitrification, and denitrification.
• The atmospheric nitrogen is fixed either biologically, or artificially to absorbable form into the soil.
• The fixed nitrogen is consumed by the plants, plants are consumed by the animals.
• Animals die and decompose that further causes denitrification of the nitrogen.