1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Trava [24]
3 years ago
12

Which is the correct sequence of events in the nitrogen cycle? A) soil nitrogen→animals→plants→fungi B) atmospheric nitrogen→bac

teria→plants→animals C) soil nitrogen→atmospheric nitrogen→plants→animals D) atmospheric nitrogen→plants→animals→Soil nitrogen
Biology
2 answers:
tigry1 [53]3 years ago
6 0

The right answer is B) atmospheric nitrogen→bacteria→plants→animals.

The nitrogen cycle is as follows:

1. Fixation:

Nitrogen gas is transformed into mineral compounds by Cyanophyceae (Anaebaena, Nestoc, Phormidium) or bacteria (Azotobacter, Clostridium, Desulfovibrio). This phenomenon only affects primitive organisms.

2. Assimilation:

The assimilation of nitrogen in the cycle consists in transforming mineral compounds into organic matter (by autotrophic organisms, ie plants) or organic matter into other organic matter (by heterotrophs, it is to say the animals). This process is what is called protein synthesis. Thus, a vegetarian will turn vegetable proteins into animal proteins, which carnivores will feed on to make other proteins. Only plants (which include bacteria) are able to synthesize proteins from mineral elements, which is why plants can be grown with a nutrient solution containing only mineral salts. it would be futile to undertake with an animal.

3. Excretion:

It is the emission of non-assimilated organic matter, because it is not digestible, and of smaller molecules, resulting from the more or less complete degradation of the organic matter, such as ammonia (amphibians of larval form, bacteria, aquatic invertebrates and vertebrates), urea (adult amphibians and terrestrial vertebrates), or in its acid form uric acid (terrestrial reptiles and birds).

4. Ammonification:

The molecules resulting from metabolism and present in the medium after excretion are decomposed into ammonia (a mineral form of nitrogen) by bacteria (Achromobacter, Bacillus, Clostridium, Corynebacterium, Flavobacterium, Nitrococcus, Proteus, Pseudomonas, Sarratia).

5. Nitrification:

It is the succession of two processes: nitritation, which leads ammonium ions to oxidize to nitrites by bacteria (Nitrosomonas, Nitrosococcus, Nitrospira) and nitration, which converts nitrite to nitrate by bacteria also (Nitrobacter) .

6. Denitrification:

Reverse process of the previous one, leading to the reduction of nitrates to nitrites and eventually to dinitrogen or ammonia and carried out thanks to denitrifying bacteria (Azotobacter, Arthrobacter, Bacillus, Pseudomonas, Thiobacillus)

nikklg [1K]3 years ago
5 0
I am pretty sure it is B
You might be interested in
It is advantageous for grazing mammals to gather in groups because groups
Vlad1618 [11]
In my opinion, the correct answer among the choice given above is option D. It is advantageous for grazing mammals to gather in groups because groups <span>offer greater protection from predation. It protects them  because predators will think twice in nearing the group because it is outnumbered.</span>
7 0
3 years ago
Read 2 more answers
How are autosomal traits usually inherited?
weeeeeb [17]

Answer: they can be either dominant or recessive

Explanation: due to the effects of one Gene are usually inherited in a simple mendelian pattern.

6 0
3 years ago
Read 2 more answers
Choose the statements below that are true.
Paladinen [302]
What statements??? There is nothing there
4 0
3 years ago
The reproductive organs of gymnosperms are found in _____.
oksano4ka [1.4K]

Answer:

Cones is the correct answer because cone is the female reproductive part

7 0
3 years ago
Read 2 more answers
The lungs are considered to be apart of which hierarchical level?
rjkz [21]
The lungs are considered to be an organ.
5 0
3 years ago
Other questions:
  • The orbital radius of Venus is 0.72 AU. What is this distance in kilometers
    6·1 answer
  • For the given quadratic equation convert into vertex form, find the vertex, and find the value for x=6. Show your work.
    8·1 answer
  • FASSST!!!physical science!!!!!
    13·1 answer
  • What is the definition of mutualism
    10·2 answers
  • Summarize what has caused a recent increase in the rate of extinction.
    6·1 answer
  • What is biodiversity?
    13·2 answers
  • Two species are able to breed with each other and produce offspring, but the offspring quickly die. This is a __________________
    14·1 answer
  • Hi, if you could please help with this biology worksheet, it would be greatly appreciated!
    12·1 answer
  • Name:<br> Name:<br> 1.<br> Which of the following structures is not found in<br> bacteria?
    13·1 answer
  • Which of the following terms describes all of the non-living components of an ecosystem?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!