The Nitrogen Cycle - Role Of Organisms

Question 1

List the four organisms which have a role in the nitrogen cycle.

Answer 1

Bacteria

Fungi

Plants

Animals

Question 2

What four types of bacteria have roles in the nitrogen cycle?

Answer 2

Nitrogen-fixing bacteria

Bacteria of decay

Nitrifying bacteria

Denitrifying bacteria

Question 3

What is the role of nitrogen-fixing bacteria in the nitrogen cycle?

Answer 3

They convert atmospheric nitrogen to nitrates

Question 4

What is the role of bacteria of decay in the nitrogen cycle?

Answer 4

They convert nitrogen waste to ammonia

Question 5

What is the role of nitrifying bacteria in the nitrogen cycle?

Answer 5

They convert ammonia to nitrates

Question 6

What is the role of denitrifying bacteria in the nitrogen cycle?

Answer 6

They convert nitrates to nitrogen gas

Question 7

What type of fungi has a role in the nitrogen cycle?

Answer 7

Fungi of decay

Question 8

What is the role of fungi of decay in the nitrogen cycle?

Answer 8

Fungi help to decay dead plants and animals and their wastes into ammonia in the soil

Question 9

What is the role of plants in the nitrogen cycle?

Answer 9

Plants absorb nitrates from the soil and use the nitrogen to form protein

Question 10

What is the role of animals in the nitrogen cycle?

Answer 10

Animals consume plants and use their nitrogen to form animal protein