NITROGEN CYCLE Flashcards
(10 cards)
0
Q
How do animals get protein?
A
They eat plants
1
Q
Why do we need proteins?
A
For growth and repair
2
Q
How do plants receive nitrates?
A
Absorb nitrates from the soil
3
Q
How can nitrates in the soil be replaced?
A
By crop rotation, using fertilisers or occasionally by lightning
4
Q
Why do plants and animals need a supply of nitrogen?
A
To make proteins
5
Q
What are the four types of bacteria in the nitrogen cycle?
A
- Nitrifying bacteria
- nitrogen fixing
- Decomposers
- Denitrifying
6
Q
What does nitrifying bacteria do?
A
Turns ammonium compounds into useful nitrates
7
Q
What is the job of the nitrogen fixing bacteria?
A
Turns ammonium compounds into useful nitrates
8
Q
What is the use of decomposers?
A
Turns proteins and urea into ammonia
9
Q
What is the job of the de nitrifying bacteria?
A
Turns nitrates into nitrogen
