CAN SOMEBODY Describe the nitrogen cycle to me???? PLEASEEEEE?

Question

THANKS

Answer 1

Nitrogen is constantly being recycled in the nitrogen cycle. Here is how:

1. The atmosphere contains about 78% nitrogen gas, N2. This is very unreactive so it can't be used directly by plants or animals.

2. Nitrogen is needed for making proteins for growth, so living organisms have to get it somehow.

3. Plants get their nitrogen from soil, so nitrogen in the air has to be turned into nitrogen compounds before plants can use it. Animals can only get proteins by eating plants or other animals.

4. Decomposers break down proteins in rotting plants and animals, and urea in animal waste, into ammonia. So the nitrogen in these organisms is recycled.

5. Nitrogen fixation is the process of turning N2 from the air into nitrogen compounds in the soil which plants can use. There are two main ways this happens:

a) Lightning- there’s so much energy in a bolt of lightning that it’s enough to make nitrogen react with oxygen in the air to give nitrates.

b) Nitrogen-fixing bacteria in roots and soil.

6) There are four different types of bacteria involved in the nitrogen cycle:

a) Decomposers- decompose proteins and urea and turn them into ammonia.

b) Nitrifying bacteria- turn ammonia in decaying matter into nitrates.

c) Nitrogen-fixing bacteria- turn atmospheric N2 into nitrogen compounds plants can use.

d) Denitrifying bacteria- turn nitrates back into N2 gas. This is of no benefit to living organisms.

Answer 2

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Answer 3

As you probably already know, the nitrogen that makes up about 78% of our atmosphere is unusable in that form.  So nitrogen must be converted into forms that can be used.  Two of the various ways in which this is accomplished:

1. Lightning transforms some nitrogen into an absorbable form, which falls to earth with the rain. Plants use this as a naturally provided fertilizer. After humans and animals consume plants and use this nitrogen, it returns to the soil as ammonium compounds and some eventually converts back into nitrogen gas

2. Nitrogen fixation is also accomplished by bacteria that live in nodules on the roots of legumes, such as peas, soybeans, and alfalfa. These bacteria convert atmospheric nitrogen into substances that plants can use.