Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

A level Biology > Nutrient cycles > Flashcards

Nutrient cycles Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

Nutrient

A

A substance used by an organism to survive, grow and reproduce

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

Saprobionts

A

Decomposers like bacteria and fungi which break down dead material and absorb to use the nutrients

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

Saprobiotic nutrition

A

When a saprobiont secretes enzymes out of cell that will digest the dead material and absorb the nutrients produced
In external, digestion

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

Left over nutrients from saprobiotic nutrition is…

A

Left behind in soil for other organisms

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

Nitrogen cycle

A

How nitrogen moves and is recycled in ecosystems

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

Dead material containing nitrogen eg DNA and protein is…

A

Decomposed by saprobionic nutrition and released as ammonium ions

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

Ammonification

A

Decomposition of dead material by saprobionts releases ammonium

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

Ammonium is converted to what..?

A

Nitrite then nitrate

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

Nitrification

A

Oxidation of ammonium to nitrite then nitrate ions by nitrifying bacteria

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

What completes nitrification of ammonium?

A

Nitrifying bacteria

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

What converts nitrate back to N2 gas for the atmosphere?

A

Denitrifying bacteria

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

Oxidation of nitrates to nitrogen process is called…

A

Denitrification

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

Nitrates in soil use

A

Enter plant roots via active transport to form proteins/DNA

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

Process which converts nitrogen gas in atmosphere back to ammonium ions?

A

Process called nitrogen fixing

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

What converts nitrogen gas to ammonium ions in nitrogen fixing?

A

Nitrogen fixing bacteria

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

Where does nitrogen fixing bacteria live?

A

In root nodules of legume plants

17
Q

Denitrifying bacteria lives best in…

A

Anaerobic soils

18
Q

What causes anaerobic soils?

A

Water logging which reduces air packets in soil

19
Q

What bacteria works best under aerobic conditions?

A

Nitrifying bacteria
Nitrogen fixing bacteria

20
Q

What causes aerobic soil?

A

Ploughing

21
Q

Phosphate ions usage

A

In ATP/ADP
in RNA/DNA

22
Q

How does the phosphate cycle start?

A

Saprobionts externally digest dead material eg dna from animals/plants which releases phosphate into the soil

23
Q

Where does the phosphate released into soil to?

A

Leeched into water bodies
Absorbed back into plants

24
Q

Phosphate leeched into water…

A

In solution and then Enters aquatic foodwebs
The dead material sinks to form sediments at the bottom

25
Q

Sediments containing phosphate ions will rise to the surface..

A

Then weather down to release phosphate back to soil

26
Q

Phosphate ions in solution in soil will..

A

Enter plant roots via active transport
Used for dna etc then enters foodwebs by being eaten by animals which eventually die and cycle continues

A level Biology (60 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions