Question

plz solve any 2 answers

Answer 1

1) We are generally under the impression that we only need oxygen to live. Well, you couldn’t be more wrong! There is a laundry list of elements that animals need for survival. One such element is Nitrogen. But we can’t just get nitrogen from the air. It needs to be converted to nitrates, via a process called nitrogen cycle. So let us learn more about this fascinating concept.

The air we breathe contains 78% nitrogen, 21% oxygen and remaining are other trace gases. The nitrogen component of air is inert. So this means plants and animals cannot use it directly. To be able to use nitrogen, plants convert atmospheric nitrogen to nitrates, nitrites and ammonia compounds by a process called the nitrogen cycle. Animals derive their nitrogen requirements from plants.

• Nitrogen cycle consists of four main steps namely:

1) Nitrogen Fixation

2) Ammonification/ Decay

3) Nitrification

4) De-nitrification

It is important to note that microorganisms play an important role in each of these steps

3) characteristics of microorganism

1) Microorganisms are the smallest organisms on Earth.
2) Microorganisms may be composed of prokaryotic or eukaryotic cells

3) they may be single-celled or multicellular.

4) they are microscopic organisms

Microorganisms are divided into seven types: bacteria, archaea, protozoa, algae, fungi, viruses, and multicellular animal 

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Answer 2

Ans1 :- nitrogen cycle is a cyclic movement of Nitrogen between atmosphere , organism and soil
5 main process
1) nitrogen fixation
2) nitrification
3) nitrate assimilation
4) ammonification
5) denitrification and anammox

Ans 3:- characteristic of microorganism are
1) microorganism are the smallest organism in the world
2) lack of membrane bound organelles
3) microbes are microscopic organism
4) for example :- bacteria, fungi etc...