Nitrogen cycle

Question 1

what is the order of compounds in the nitrogen cycle

Answer 1

nitrogen gas, ammonia, ammonium ions, nitrite, nitrate

Question 2

what is nitrogen fixation

Answer 2

the process of converting nitrogen gas into ammonia

Question 3

name two nitrogen fixing bacteria

Answer 3

rhizobium and azotobacter

Question 4

what do azotobacter do specifically

Answer 4

convert ammonia to ammonium ions in the soil

Question 5

what do bacteria convert nitrogen gas into

Answer 5

ammonia

Question 6

what is the process of converting nitrogen into ammonia known as

Answer 6

nitrogen fixation

Question 7

what are examples of nitrogen fixing bacteria

Answer 7

Azobacter and Rhizobium

Question 8

what do Azotobacter do

Answer 8

Convert nitrogen gas into ammonia and then into ammonium ions in the soil

Question 9

what do Rhizobium do

Answer 9

live within the root nodules of leguminous plants and directly transfer ammonia to the plant

Question 10

what do nitrosomonas do

Answer 10

they convert ammonium ions into nitrites

Question 11

what do nitrobacter do

Answer 11

convert nitrites into nitrates

Question 12

what is nitrification

Answer 12

the process of converting ammonium ions into nitrites and then nitrites into nitrates

Question 13

what do nitrifying bacteria need to carry nitrification

Answer 13

oxygen

Question 14

how does nitrogen in plants and animals return back to the soil

Answer 14

by death and excretion which is fed on by decomposers

Question 15

what is ammonification

Answer 15

the conversion of ammonia from death and excretion consumed by decomposers into ammonium ions

Question 16

what do denitrifying bacteria do

Answer 16

denitrifying bacteria convert nitrates into nitrogen gas in denitrification, this occurs when they carry out anaerobic respiration

Question 17

what are nitrogen-containing compounds in waste broken down by

Answer 17

saprobionts

Question 18

which processes can occur in anaerobic conditions

Answer 18

nitrogen fixation and denitrification