Nitrogen cycle Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

How is nitrogen gas in the atmosphere fixed into nitrogen compounds that can be used by organisms?

A

nitrogen fixation by lightning and nitrogen fixing bacteria - also by Humans in a process called the Haber process used to make artificial fertilisers.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Ammonium ions to nitrites

A

Nitrification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Nitrites to Nitrates

A

Nitrification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Nitrates to Nitrogen in the atmosphere

A

Denitrification

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

nitrates to producer

A

absorption

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

nitrogen in atmosphere to producer

A

nitrogen fixation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

producer to consumer

A

feeding and digestion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

producer and consumer to decomposer

A

death ( and excretion)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

decomposer to ammonium ions in ground

A

decomposition

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

organisms involved in nitrogen fixation

A

nitrogen fixing bacteria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

organisms involved in nitrification

A

nitrifying bacteria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

organisms involved in denitrification

A

denitrifying bacteria

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

organisms involved in decomposition

A

decomposers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

what benefits to leguminous plants of having root nodules containing nitrogen fixing bacteria

A

absorb more nitrogen and grow quicker

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

two examples leguminous plants

A

clover and peas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Which letter shows absorption of nitrates to make new nitrogen compounds for growth?

A

C

17
Q

Which letter shows where ammonification occurs converting nitrogen containining biological molecules into ammonium ions?

A

B

18
Q

Which letter shows denitrification?

A

D

19
Q

Which letter shows natural processes that can fix nitrogen from the atmosphere?

A

A

20
Q

How are nitrates used by plants for growth?

A

Soluble nitrates are absorbed by the roots and are assimilated to make amino acids. These then build proteins / enzymes which are necessary for growth.

21
Q

What is assimilation?

A

The formation of organic nitrogen compounds like amino acids, DNA or ATP from nitrates